Sure - I agree; that was only the slice of the pie attributable to the extreme success (1%). There's also exits which are non-unicorn but non-trivial which probably bump that number up quite a bit.

It's a tricky problem in the general case because the skills that would allow you to capture a high compensation in FAANG probably correlate with the skills that would lead to a successful startup (not perfectly, but somewhat), so the better your options in FAANG the better your potential outcome via startup (with much higher variance).