Nah. WMA is in the business of taking people who are already successful and making them richer. They are negotiators.
YC resembles a top-tier investment bank, like Goldman Sachs: they gussy you up for the road show, they introduce you to their very large network of investors, and they take 7%. And they get high prices for their clients because they (YC/Goldman Sachs) has a reputation for getting the best companies into the funnel, which is in turn based on getting high prices for their clients.
William Morris discovers and coaches talent. They take a management fee. They intro their talent to film makers who have money. They're really only looking for super stars, but they sign a lot of other people by mistake.
YC resembles a top-tier investment bank, like Goldman Sachs: they gussy you up for the road show, they introduce you to their very large network of investors, and they take 7%. And they get high prices for their clients because they (YC/Goldman Sachs) has a reputation for getting the best companies into the funnel, which is in turn based on getting high prices for their clients.