With all due respect, the reason you might have to argue the point is probably because even back in 2007 the application page said:
The people in your group are what matter most to us. [...] Your idea is important too, but mainly as evidence that you can have good ideas
And Drew was passed up because his idea was bad (not given a "we like you more than your idea" option). It seems like a skating to where the puck is and not where it's going kind of thing.
YC probably won't miss out on a DropBox that looks like a DropBox, but you might miss out on a Drew Houston that eventually creates a DropBox.
Honestly I think that YC is opting to make fewer risks these days, not more. The days where you can get funding without traction are numbered, and with it go the real crazy idea startups like AirBnb, Stripe, and Twitch.tv.
It takes a long time to make a billion dollar company, but with the increased emphasis on traction, I wonder if accelerators like YC are thinking too short term. Would an unknown Justin Kan or Alexis Ohanian even get funded today without traction?
And Drew was passed up because his idea was bad (not given a "we like you more than your idea" option). It seems like a skating to where the puck is and not where it's going kind of thing.
YC probably won't miss out on a DropBox that looks like a DropBox, but you might miss out on a Drew Houston that eventually creates a DropBox.