> The parents are a bunch of professionals, virtually nobody doing anything else, and most kids went to private primaries + got tutored. We must have left some poor but capable kids in the wrong school.

The idea that the school you go to matters for your career seems unsupported by evidence (outside of consulting, law, medicine and investment banking). Most people don't go to ivy league schools (by definition). Looking around at senior leaders at most of the tech companies I have worked at, very few of them are Ivy leaguers. The Ivy League has a really great brand but the impact is overblown imho.