You speak desperation language.

This is like a woman that rejects you on a date and you take it too seriously: " I will do whatever you wish to test my love". It does not work that way because you are putting her in a high pedestal and yourself in a lower status.(And you could be sorry for making commitments to people you don't really know yet, "may you get what you wish for" is a curse on China).

Maybe it is not the point that you could do something in 72 hours, but what you could do in 720 or 1000 or 3000. Sometimes you need to do marathon instead of 50 meters. I believe PG wants people that won't abandon on the hard moments of a startup, people that will "find a way" over difficult circumstances.

You don't need Y Combinator to success.