Yeah, that's kinda curious, innit? When I studied screenwriting, the professors always had a debate whether drama (or comedy) is an actual genre or a "tone" of a show since one could define every show with more than one genre.
However, using comedy in the same way isn't quite the same. Sitcom is a pretty popular genre, but for me, I often consider it more of a technical approach or a subgenre if you will. This raises the question, however, what is the show's genre if not comedy, then? Really curious stuff in my opinion, but naturally, tv-series/films differ quite a bit from novels/comics, yeah?
I, personally, prefer using drama tone in my work, but I wouldn't put it as my main genre, maybe 'cus everything above. This being said, I don't have a problem it used as a genre in novels/comics—I'm not adept enough to have a real opinion.
Sorry this is a bit long, and it's supposed to be a sharing thread, buuut... it's an interesting topic, is all.
-Z