The problem is usually that in a very disrupted classroom, teaching is going to be impossible, so you do need to have the ability to keep things manageable.
If kids start climbing on things and throwing stuff no one is going to pay attention to math.
The thing about classroom control is that it is easier to notice early signs and stop the situation from escalating into behaviors that need to go through a whole punishment process (possible student trauma, paperwork for the teacher and administration), and so teaching how to correct things early and keep things controlled is a win-win for the student, teacher, and administration, and also the rest of the class.
If kids start climbing on things and throwing stuff no one is going to pay attention to math.