I disagree that Cael "doesn't want to support or grow NCAA wrestling." Yes he may have killed National Duals and I'm definitely on the side of wanting a duals championship, but for example other than forfeiting to Zahid a few years back he doesn't usually sit guys out for duals.
There have pretty much always only been a small handful of teams that can keep up, but that's more due to Cael being the best coach than NIL/transfer portal.
The guys supposedly being offered half a million out of high school weren't going to go to a mid-major.
The one concern with NIL/transfer portal is big schools stealing guys from small schools, and yes that has happened but in most of the bigger name cases there have been extenuating circumstances such as being a grad transfer or coaching changes at the former school. And of course the B10 doesn't have a monopoly on this - Olejnik to OSU and Feldkamp to ISU are two B12 examples this season. There have also been a non-insignificant number of guys transfer from "big name" schools and having success at smaller schools.