Y Combinator, the world's most influential startup accelerator and the launchpad behind companies like Airbnb, Stripe, and Dropbox, has placed a massive bet on AI-native agencies. Through their Request for Startups (RFS) and the vocal advocacy of Group Partner Aaron Epstein, YC is signaling that the $700B+ professional services market is about to be fundamentally disrupted by AI-native delivery models. This is not a fringe thesis or a speculative bet on far-future technology. It is happening now, and the smartest money in Silicon Valley is positioning accordingly.