I think Bayern cares for tradition, and the fans have a big say in their decisions (since theyre basically part of the club), so hey dont want tp abandon BL and German football in general. So if they could somehow play this inatead of CL while keeping BL i think they would do it. So far it looks like thats not possible
however I think the system without another corrupt middle man (like the NCAA) creates more cost and waste. I prefer club football's ecosystem of youth academies, leagues, feeder clubs, etc.
Chairman: Florentino Perez [Real Madrid]
Vice-Chairman: Stan Kroenke [Arsenal]
Vice-Chairman: Andrea Agnelli [Juventus]
Vice-Chairman: John W. Henry [Liverpool]
Vice-Chairman: Joel Glazer [Manchester United]