To act as if is an entirely separate operation is naive...it is not as if the collective is going to recruit players, just as Painter/Purdue is not directly paying them, but, they are working hand-in-hand.
Sean Miller/Will Wade made big money...but, did not need to...they were just the middle men...Wade in particular was lousy as a coach, and, Miller ultimately was as well...I guess there may be a case such as with Calipari or someone like that where the HC does matter, at least in someone's mind...but, in that players are just being bought now at the highest levels, who the HC is likely becomes far less relevant...to players, and, to Universities.
It was necessary in the past to pay a HC what was "market rate"...that will change with NIL, as, there are going to be a lot of schools where the mere thought of competing is an actual afterthought...no need in such cases to pay someone millions of dollars any longer, probably even more so the case if said school is not paying players.