people underestimate brains "self correction ability".

I use slingshot, unlike gun's sight post slingshots do not have any sight in center of projectile path, basically you eye one of the fork's of slingshot and your brain quickly adjusts to it correcting whatever angle deviation is there.

I can shoot stuff in air without even aiming now, i got so good no sight nothing.

Reminds me of playing Tribes. First start playing, can't hit anything ever because things move too fast and your brain doesn't get the physics. But then you're hitting stuff zipping around at crazy speeds by just kinda intuiting.

Guess we're evolved to throw spears, so we're good at that kind of thing.

This is why I have little patience with people who over do the drama of something being impossible and unnatural. I have my prefferences too but it's just a preference. There is no natural. Humans are ambi-everything. What part of nature is typing 100wpm on qwerty?