That one was sarcastic dude
As you can see by CannedPotato's response, might not have been (I'm not super-active here, so idk who people are and their character, so I might be wrong ofc).
You could actually skip progression with this, similar to the old reaver shark it means that you could get things earlier than usual but it requires an activity they do not enjoy.
If you do enough of the angler quests, you can get a golden bug net which functions to catch lava critters and get hellstone pre-boss again, just with even more steps.
As IndigoGollum said, if it gets considered it should check for if the evil boss has been defeated.
Sure it would, it would only require you to first get to the ocean, get some decent fishing gear, and start grinding angler quests.
Let's assume it takes you 20 minutes of playing to setup for fishing (finding good fishing spots in most biomes, getting the angler, getting iron/lead for a rod).
Let's assume you get a bit lucky and get the golden bug net after just 40 fishing quests completed. Let's assume that getting bait, going to your fishing spot, and actually catching the quest fish takes, on average 5 minutes, and that the rest of the time in day is spent sleeping in the bed (4 minutes / day) - let's round up to a total of 10 minutes/quest. It means that fishing for the bug net
in this somewhat lucky scenario takes about 7 hours of playing (and by "playing", we really just mean fishing), and you are done. Oh wait, no, now you need to fish in lava.
Given the amount of quests you've done, let's assume you have full angler gear + golden fishing rod, and access to best bait (magma snails and, if lucky with initial hellstone crates, master bait + lavaproof fishing hook) and potions. Given the good gear setup, let's assume you get a bite every 2 seconds. You have about 2% chance that it is a hellstone crate. If we assume the same odds for getting hellstone/hellstone bars as we do other bars from the current hellstone crate, we get the bars about 25% of the time, and ores 15% of the time. To skip progression, you'd need enough to make a molten pickaxe (at the minimum), which needs 20 bars. Let's assume that this would take 3 successful drops of hellstone. But don't forget, you could get other ores as well.
With the current drops (and let's assume we can't get tin or copper ore, which actually makes things worse), you'd have 1/7 chance of getting hellstone (instead of any of the other 6 ore/bar types), which is about 15%. Let's also make a crazy assumption that we can just add up the odds of getting bars and ores into a single probability of 40% (25% for bars + 15% for ores), to make maths easier.
The chance of getting hellstone ore/bars from a particular crate is ~6%.
Combining this with the rates of getting hellstone crates at 2%/catch, you can expect to have
a chance of 0.12% of getting hellstone with any one catch. If you had about the same luck as you did with getting the golden bug net (about 40th percentile), it would take about 400 catch attempts. For a single drop. You need 3.
That's another 45 minutes of fishing, if you are again somewhat lucky. But that's again being quite lucky, and assuming you have quite good gear to get a hook every 2 seconds.
If you are a bit less lucky (60th percentile), and your gear allows for a rate of 4s/catch,
it would be closer to like 2~3 hours of extra fishing.
So yeah, in conclusion, I'd argue that it is not really a viable method of "skipping progress" (though for sure entirely possible), given how much time it takes to complete. The reason reaver shark was an issue is because you could get the strongest pre-hardmode pickaxe in as little as like 10~15 minutes if you got lucky, an hour if your luck was kinda low. It would take 7~8 hours to get enough hellstone bars for a molten pickaxe with hellstone crate fishing (if you are a bit lucky as well, quite a bit more if you weren't), which is like 10 times slower at the best (and easily 100 times slower at the worst).