I study Jinenkan bujutsu. Hojutsu (firearms) are a traditional category, though it is a category we as a student are expected to pursue on our own. Unfortunately, there are (as others have said) hoplophobes in the "x-kans" just as anywhere else. These are typically people who refuse to acknowledge the reality that no qualitative difference exists between firearms and other weapons. All can be used to kill- firearms just take less time to learn and master.
All of the teachers and students of the x-kans that I respect believe in having at least a working knowledge of firearms. My previous teacher (Bud Malstrom) was a former Marine, a certified executive protection specialist, and a police reserve officer. We often did "Spyderco checks" in class!