Young people understand that it isn't possible to win gambling, they due it anyways because of thrill seeking, which decays for multiple reasons as you get older, but has a lot to do with reputation/how established you are and your relative comfort level.
This is probably why old people in highly competative fields take HRT, Dopamine Agonists, Stimulants or Psychedelics
A bunch of truly naive people trying "impossible" things sounds a bit like the Infinite Monkey Theorem.
However, what if they are grad students, or the best of the best product people/devs, which is what YC tries to harvest?
That improves the chances of the naive finding some actual disruption, does it not?