Maybe I am just unlucky or unskilled, but I spent roughly 20 years working at startups or innovation labs. I was "close" to some big events where I could have made big $$ but made 0. Both at my own startup and being at early stage duds. Its kind of like I was the tech guy in 'life of Brian'. However, in the last three years I have built more wealth at a FAANG than I have in the previous 20 years. YMMV.
Back to the thesis, I think pg is saying wealth is built by startups - I am just here to say that's it still really rare unless you get lucky. But maybe you create your own luck by living in SF - I am a Bostonian.