By your logic, this implies that in the best possible circumstances (YC), you're not going to get above a few percent chance a priori of a huge success if you work like crazy.
Whereas an equally intelligent person working reasonable hours on the side when appropriate has a decent chance of making a profitable lifestyle business in the millions without the possibility burnout and debt.
$10 million, minus the VC investment, split each among 2 or 3 founders. That ends up being what, $2-3 million in 4 years? I personally know several people who make more than that off of one iPhone app on the side. Apple's paid out billions to app developers.
Again, look at the numbers: what percent of YC investments have exited at $10 million+ in 4 years? Again, much closer to 10% than 100%. This is in a thread where pg implies that the chances of a big success are 2/3 or higher for some people. Empirical evidence proves that top investors are not right anywhere near the probability suggested.
No VC whose name you recognize will invest in bad startups to get the management fees.
For example, YC's whole investment model is based on the assumption that it's not just hindsight, and that the YC partners can use the data model that they have, that gets better with each batch, to predict which founders fall into the "success bin", and they choose to invest in those.