Apple, like everyone else in the industry, doesn't have enough DRAM. For every 512GB in a Mac Studio, they could put those chips to 64 Macbook Neos^.

Apple benefits enormously from on device AI (sells hardware) and prominently features software like LM Studio in the marketing and press releases of their new hardware.

^Technically the on-chip packaging of A-series processors make this a bit different, but point still stands.