The problem for UWM or others like them is that they don't have "deep pockets". They have great access to credit via their warehouse lines but for them or anybody else in that game if that were to go away the game is up and right quick.
The basic allegation is that the arrangement post "ultimatum" (or whatever you want to call it) has lead brokers to deliver in many instances substantially all of their loans to UWM when a better option for the consumer cost-wise was available thus breaking the general fiduciary duty an independent broker has to their client's best interests above their own.
Now that said read another article last night that the collaborators on the research and article I posted have a significant short position in UWM (of course) but I am reminded that Burry, Eisman, Lippman et al also had significant short positions underpinning their motivations.....didn't make them wrong.
So who knows, but could be interesting to see how it all plays out.