There's no way any accelerator can be competitive against YC if Peter Thiel is going to be doing office hours
After all that's a bit like thinking that someone has to go to an Ivy League school (let's say Harvard) or "game over".
We all know that there are many successful people that didn't, and that additionally aren't even college graduates (and didn't drop out of an Ivy School either).
And by the way, YC is not the entire entrepreneurial world either.