Sounds an awful lot like WeWork trying to brand itself as a tech company.
If allocating capital well makes someone a one trick pony, then I think we need many more ponies in the world.
Also I don't think Sam proved YC can scale, in fact I think it's the opposite and we just haven't had enough time to watch it play out. I certainly hold YC in lower regard than I used to, and I'm a YC alum (alternate account).
He is a successful investor, I can't deny that. But he hasn't proven anything with OpenAI yet. And I think anybody that actually followed OpenAI from the beginning is really disappointed in how "open" it really is. The fact that you point to fundraising as proof of success is so bizarre. By that logic WeWork should be your favorite company of the last decade.