They use some of it in physics but not all or even most of it.
It's an old tradition to learn more maths than you will ever need. Plato stated that no one should be allowed to be a "philosopher king" without studying maths for 30 years first
I hate it when you ask why something works the way it does, and the teacher will say "That's just the way this method works, dear." Like these people are supposed to be mathematicians, and they never tried to take these methods apart and examine how they work?
"Method." "Standard model."
The fuck is up with that shit? How about this is the root of how this works, now go figure it out? Fuck a bunch of memorization. That's not understanding how something works at all.