So it is possible to get extraordinary results through the application of discipline to boring, traditional approaches.
I've flown a kite once in my life, as part of a competition, that I won. My kite flew more than twice as high as the next highest kite. After the competition, people asked how I got my kite so high, and my answer was just that I brought more string than they did. Some might attribute that to dumb luck, but I have a history of winning silly little competitions like this by being prepared.
And are most YC applicants significantly revolutionary? How many systemic barriers would you expect to hit if you have some insight on how to build the next popular photo sharing app, for example? And if they are applying for YC and answering that question, it's not a safe assumption to make that the founders would have hit up against those barriers yet. A lot of YC founders are barely out of college and just turning their idea into reality.