To be fair, the Tsunami is supposedly the highest damaging weapon in the entire game, if loaded with Holy Arrows.
But that's irrelevant. The point of this thread was that homing weapons were inherently OP, and the Tsunami isn't homing. As the game currently stands, it can never be homing.
But the premise that homing weapons are OP is false anyway. Newer players will likely think that they are, but they don't realize that skillful use of other weapons will invariably produce higher levels of damage.
In your video, I noticed that you didn't seem to use The Horseman's Blade. That's because its use really isn't that of a homing weapon. THB will only summon homing pumpkins if you're within sword range, at which point you may as well be using a Terra Blade. (And yes, the Terra Blade does have a higher overall DPS.)
Conversely, despite not technically being a homing weapon, Magnet Sphere is used in a manner very similar, if not identically to a homing weapon.
Your argument is that homing weapons eliminate skill, as a whole, from the entirety of Terraria. For this to be true both of the following must be true:
A. Homing weapons are inherently superior to any other weapon of the same tier - in other words, they must have the highest consistent DPS for a player of fair skill for the point in the game in which you can get them.
B. Homing weapons are the most practical way to proceed, and the best way to fight every enemy in that point in the game.
Fortunately, both of these points go hand in hand.
So let's address each of those addressed weapons in turn.
Chlorophyte Bullets: Chlorophyte Bullets certainly have a high damage value, but as far as DPS goes, they're actually pretty garbage. Crystal Bullet shards each deal 60% of the damage of the original bullet. So if you hit with even 1 of those 3 shards, you've already dealt a lot more than Chlorophyte bullets. If you're unwilling to hunt or farm Crystal Shards, then Venom Bullets will do a lot more damage, and Crystal Shards are more easily farmed than Chlorophyte.
So A is false, due to the fact that Crystal and Venom do more damage.
B is false, due to the fact both Crystal and Venom are both either of equal or greater ease to obtain.
Magnet Sphere: Magnet Sphere is obtained at the same time as both the Shadowbeam Staff and the magnificence that is the Inferno Fork. Both the former and the latter are superior, the former at range, and tight areas, and the latter at being the single best weapon in the entire game single enemies and open spaces. Moreover, unlike the M. Sphere, the other two weapons can hit many enemies at a time, which the M. Sphere simply cannot. The M. Sphere takes 19 mana per cast, the Shadowbeam Staff, 6, and The Best Weapon in the Game, 14.
A is false, because both of the equal-tiered magic weapons are of superior damage, and have superior area control.
B is false, because all three of those weapons are about equally as available, and all of them are equally usable.
Flailron: Flailron is one hell of a weapon, and probably inflicts the most damage on single enemies than any other Melee weapon. Unfortunately, it falls short against any sort of crowd, for a variety of reasons. First off, if a bubble tracks an enemy, but that enemy gets slain before the bubble hits it, that bubble will not change it's tracking, and continue to orbit that enemy's death site. Second, no part of the Flailron pierces. Weapons like the Terra Blade and the Paladin's Hammer both deal more damage to crowds. Later on, the North Pole deals more damage to single enemies than even the Flailron, and requires more skill.
So A is true, but I find that okay, because there will always be weapons specialized for certain tasks.
B, however, is not true, as the Flailron is likely to be obtained right before the Moon Events, you're likely to need crowd control to quickly push to the higher waves, and to most efficiently proceed into superior weapons. Therefore, other weapons, like the Terra Blade and the Paladin's Hammer, are more practical, and more useful for proceeding in the game.
Scourge of the Corruptor: I could bring up the Scourge's problems, but they're essentially exactly the same as the Flailron's. So just read the above with 's/Flailron/Scourge of the Corruptor'
Razorblade Typhoon: Ah, piercing, rapidity, low mana usage, and homing. Sadly, the damage is hampered by its piercing ability, and by its tendency to stick to enemies that are already getting piercing invincibility. Other weapons, like the Inferno Fork, would get more damage, just because you can direct the projectiles away from groups of enemies already getting grinded by the infernos. The Shadowbeam Staff can cover a wider area in a well-built arena. The Leaf Blower has a greater DPS on single Targets. In fact, the Typhoon's only really useful on weaker enemies that you really don't want to bother with. (Admittedly, R. Typhoon is my second favorite weapon, after the Best Weapon in the Game.)
A is untrue, as other weapons exceed it in potential DPS.
B is false, as the Typhoon's weaker in pretty much every area than other, more specialized weapons.
Snowman Cannon: I really don't know why you're bringing up the Snowman Cannon. The explosions are cool, but Hellfire Arrows/Explosive Bullets will deal more damage over a potentially wider area. The Venus Magnum and Tsunami deal more damage with proper loadouts. (Crystal Bullets and Holy Arrows, respectively.) It's a fun weapon, to be sure, but the slow fire combined with the homing suggests that it's to be used against bosses, whereas the explosive nature of rocket-using weapons suggests being used as crowd control. Nearly every other equal-tier weapon is more powerful, especially against the Moon Events.
A is false - Just use the Tsunami.
B is false - Just use the Tsunami.
So yes, homing weapons require significantly less skill, but the way you've presented them - as a threat to to the Terraria combat meta, and objects that promote the abandonment of all skil - is false. Period. They are not the best weapons, as other weapons will accomplish the same task much faster and more efficiently. Moreover, they are all at a point where the player has proven they have skill - by having beaten several daunting bosses, and hunting for rare items in incredibly dangerous environments. Let the player relax a bit. Post-Plantera is the time where you want the player to be able to run around the world acting like a god. These weapons serve just that purpose; Remember that the good players will always use skillful weapons. They are invariably more powerful.