I have a fantasy story I'm writing and several other fantasy ideas, which treats (in-depth or almost) some serious real life problems, such as diseases (mental or corporal), mental health degradation (like losing sanity), death, war, suffering, violence, sexual abuse and/or rape, prejudice, sickly envy, human being's cruelty and the horrors they are able to do/cause, etc. (all portrayed negatively). Of course, it's not all of these subjects in one single story, just 1-4 of them in each one, and the rest of the story is the story per se, and considering these stories are not dark fantasies, some of them include some lighter and relieving subjects. I like the habit I have of creating some stories with such heavy/dark subjects (not that that's exclusive to me only).
However, I have doubts if that's a good idea after I heard that most of the readers who like the fantasy genre are escapists, i.e., they like to escape from real life, not read more of that but with a fantasy setting.
That's a big problem and a dilemma, since I like fantasy settings due to the freedom they offer to shape and paint the world however I need or like, different from realistic settings, that requires to follow all of the real life's rules. And including such subjects is a characteristic I have, and I wouldn't like to amputate my story to please the readers, because then I would be the one displeased, as the story would end up not being what I initially wanted it to be, but I also don't want to limit the public to just a few readers, so I'd need in some way to please the reader, consequently displeasing myself.
But the question is: Would it be a shot in the foot a fantasy to have such subjects? Would it really be a turn off for most of the fantasy readers if the fantasy have these bits of reality?
Just clarifying: these subjects are not just put there and that's it. Instead, they are treated in-depth accounting all the consequences and sufferings connected to these things. For example: fantasy wars have little weight per se ("Wow, yet another fantasy war... Such darkness!". No). But what about the impacts, the consequences of such war? What about the innocents brutally killed, and the lives destroyed because of mere territorial interests? Things like that.