I felt the same about Mark Jackson being fired.
I don't think it's that simple
I'm not going to say Joerger was a better coach than Jackson, but the Grizz played more to their identity. It took Jackson a couple games to realize he should go small (unacceptable from a professional coach) and they still ran a lot of ISO ball and never had the best rotations.
The only reason Joerger would be fired is that the owner doesn't like him, which is silly. Jackson on the other hand kicked people out of practice, tried to fire an assistant coach he didn't have the authority to fire, and probably tons of other stuff we don't know about.
If Joerger's fired, speculation is that he'll go to the Wolves. No one wants to hire Jackson.
Jackson wasn't a good enough coach to justify how much of a pain in the ass he was. Joerger isn't a great coach necessarily, but he's at least competent and doesn't seem like a troublemaker.