Soooo.... the kids who don't get it right, aren't allowed to go to school???
It's funny, see I figure they're the ones that need it most

Pretty much sums up the world we've created..
I don't think that's quite how it works...selection tests have existed forever. Not anyone can get into Cambridge, Oxford, Yale etc...they can still get an education though.
It is just a way of filtering out those who are above average in a certain field or manner from the rest. Nothing wrong with that. Perhaps someone who got a certain question wrong on a selection test would make a poor civil engineer but a fantastic biologist.