That doesn't mean, of course, that being YC alums isn't wonderful and helpful and all the rest. What it does mean is that the people who get in are exactly the kind of people who would respond best to not getting in--namely by keeping busy on the company as if nothing had happened.
It's a frequent theme in PG's essays that YC takes people for whom building cool things is a bodily function, not something they need external incentives or security to do. This same irony applies to nearly every competitive application process (e.g. PG's other advice that companies obsessed with getting bought are the very ones that don't get bought). I feel that keeping that in mind is a very useful approach to these things.
And good luck!
