I mean, noncon darkfic whump also isn't consistent with the canon, so...? The point is not that no one can like a fic that's not like most other fics for a fandom, duh, obviously they can. The point is that if you have no information beyond "I would like this fandom please", it is normal to consider both the canon's content and what fics already exist, and if what fics already exist are mostly not about a specific aspect of canon, I would personally not write mine about that aspect, even if it's permissible within the rules.