Going to schools like that is more about having the right pedigree and connections. It’s much easier to get VC funding or get hired into a tech company as a stanford dropout than as a tripple doctorate from croatia.

Dropping out doesn't mean they didn't already get a lot of benefit from their schooling. Just that they realized they didn't need the piece of paper and could do the rest on their own.

But especially the fundamentals is where I think most of the value of a uni degree is.

Dropped out because they had companies to run, though. That's a bit different.