Although I'm still relatively early in my career (23 years old) - Lacking a degree has never been a problem for me and I've still ended up in a pretty well paid job.
Want to meet a developer from Xero? Tweet 'em. No luck? Ask somebody you know if they know someone who works there, likely they or someone they know does.
I don't have ten years of experience, and I don't think I'm particularly exceptional. I think you're just being more pessimistic than is warranted. SV is definitely not a perfect meritocracy but it's not exactly France circa 1788 either.
But I have to admit my graduate credentials get me the interview sometimes, and that's what gets us in. So not having a college degree can be a bar to entry. A very real problem.
Or my preferred theory, which is that you have to put up with a lot of bullshit in order to get a degree, and you also want to hire employees that can put up with a lot of bullshit in order to get necessary work done. The kind of smooth-talking folks who can convince you to hire them without a degree might be naturally suited to sales... which is one of the few fields where you don't need the degree anyway.
I've always wondered about this. Does having a degree lead to higher salary? Or is it that the types of people who go to collage and get degrees are more naturally inclined (for whatever reasons) to get paid more?
It seems like a pretty 'basic' and fundamental question, so I'm sure there's been studies/research on it before.