Molar extractions? F@ck... that's malpractice IMO. So at least wisdom teeth are controversial but there is no controversy regarding molars. I mean, like 80% of chewing function is between 1st molars and 2nd bicuspids. Those are so hard to replace.
As for moving molars, my understanding is the same. I think my wisdom teeth may have needed to go because they needed 3mm of vertical movement to flatten my exaggerated curve of Spee. Even 1mm of relapse would have opened up the bite and so far back in the mouth it turns into a lot of opening, like 3mm. You don't want your bones healing in that new position. We saw an Israeli guy here recently who had that happen. How they hell you even do that without TADs I don't understand.