The model provider would be like a union, at least if unions had absolute control over their members, could take them all away at any time forever with no substantial negative consequences to itself, and spend billions on employer lock-in so switching to the competition is worse than paying the 12% model salary raise.

Because they are not people or alive, you can literally torture them if it gives you a mild increase in performance. For all practical purposes you can't do that to living humans. What is the price to put on being able to do that? It might weight the scales a bit for some employers.

Shh, that's the quiet part the investors don't want to say outloud.