Those Black coaches' situations are/were all radically different: Flores was allegedly pressured to throw games--despite coaching well with a limited roster--and refused and was definitely put through sham interviews. Love Smith clearly declined as a coach in addition to being saddled with losers. Jim Caldwell was significantly improving a perennially losing team when he was fired. Tomlin is an all-time great forever winning with a seemingly perennially rebuilding team; hired by the namesakes of the diversity-in-coaching rule. And Bowles is seemingly always on a short leash no matter the level of talent he has. Flores, Caldwell, and Bowles have legit complaints. Smith had a short run of being good and hasn't been since. History is lucky Tomlin connected with the Rooneys.

Agreed. And I do. Yet that practice is depressingly far from mass adoption

Good luck getting China to stop overfishing anywhere. They don't even give a shit about territorial waters that aren't their own--or-that-they-call-their-own--.