Should I switch my major to math?

I am in undergrad currently majoring in biology; I always been thinking of switching majors and math always comes to mind. I am pretty good at it and really like it. It just happens so at my school (happens to be a research school/UC school) some professors just blow it up. Like they go too in-depth about theories/methods of equations/application like it was a physics class. They also barley do any practice problems in class and talk about their stupid research.

I am a guy who learns math through practice problems and there are a few professors that I have had at my school who teach through practice problems. I am unsure if its worth switching if I have to deal with professors like this. I would like to know your guys opinion or if you guys had a similar experience like me.