Is does but people want it to function exactly like the Gravitation Potion where you don't need to collide with anything to switch gravity. They over look the fact it's suppose to be a completely novel in function, you know; limited for fun's sake with adventure maps.
I'd much, much, much prefer if there were a toggle option to apply this to all gravity effects because it's irritating to me, but that's just my opinion.
Anyway, the fact the Gravity Globe has greater limitations is what gives it reason, what makes it a novel item compared to potions. People seem to be having a lot of trouble grasping my point so here's an example:
You make an adventure map that's challenging. New characters are given a Globe in order to complete it. There are spikes and more importantly fall damage they can't avoid. In this lies the difficulty that is easier to control as a map designer. You want more power? Find, just please stop trying to remove the "for fun" novelties others enjoy.