Of course YC would want that (in the short- to mid-term).
The only thing YC has to do is produce a portfolio of companies that looks good enough that other VCs invest into that. This is completely disconnected to building viable businesses, as they just don't have to be the ones that are left holding the bag, and as an accelerator they are in the best position to do that.
The easiest way to fill that pipeline is to pair current hype XYZ with Harvard (or other ivy league) undergrads (or high-level ex-FANG people). As long as their ROI stays above a certain threshold, that's the main way to scale up YC.