I mean there's a lot more to university than "success preparation". While university is indeed no guarantee for success, it does seem to help a lot with your understanding of the world and your ability to think critically.

I'm lucky enough to come from a country with free decent universities, so maybe it's easy for me to say, but I can't even put a price on how my education changed every single part of how I think and understand the world. That it prepared me for a well-paying job is just a nice side-effect.

How well do you think the misinformation that laid the foundation for the political shitstorm the US is in now could have taken hold if most people had a college education?