The question seems to be whether mathematics is necessary or not, but the question mark is that if mathematics is essential for physics, chemistry and almost all other subjects, then they should change their methods and language to something understandable for teachers of these subjects.
Which makes sense.
Classical mathematical language and formations are redundant, in many cases illogical and contradictory, and they furthermore have the structural appearance of a heroglipic language.
Personally, I and too many of my mathematician and physicist friends find ourselves paralyzed when faced with the simplest mathematical situation.
So what !?