If you didn't take damage from them then they would be ultimately better than any other mode of transportation in the game.
They add that damage so you use them in moderation.
But I think adding an enchantment to neutralize the damage caused by Enderjumping would be nice, as opposed to all fall damage...then again the fall damage enchantment might cover that already?
and... teleporting should damage you a little.
They don't work in Creative mode, even if you don't have any mods. It doesn't teleport you.
They add that damage so you use them in moderation.
But I think adding an enchantment to neutralize the damage caused by Enderjumping would be nice, as opposed to all fall damage...then again the fall damage enchantment might cover that already?