I don’t understand where you’re coming from.
The horror genre is full of bad things happening to good people. And bad things happening to bad people. Were they all depicted tactfully? Or rather, with sufficient tact to satisfy every viewer, even the most sensitive? No, because some people don’t like horror. Some say “Horror isn’t for me” and that’s okay. Some people put themselves through horror not for them anyway, and then complain about the gore in the gore movies and the incest in the incest games. What’s next, complaining about the ero in eroges? Age ratings aren’t there because you’re expected to magically become okay with certain topics upon hitting certain age milestones. They’re there because part of growing up is understanding what Twitter doesn’t: Real is real and fictional is fictional. Real people deserve rights and fictional characters don’t.
Remember when loonies on twitter got mad over Berserk, Redo of Healer, and Goblin Slayer? Redo of Healer wasn’t even good. Artists shouldn’t concern themselves with how concern trolls react to fiction.
If the writer’s artistic vision includes incest, compromising on that artistic vision would be compromising on his artistic vision. If he decides “Actually I’d like it more without it” he’s free to change that artistic vision. But if he changes it for fear of an audience’s reaction, that’s compromising his artistic vision and that’s tragic and inauthentic. Just like I’d be compromising on my theoretical artistic vision for a grim and gritty serious war story if I thought “Actually the audience would probably like this game more if the hero was a bland overpowered half-god half-dragon self-insert wish fulfillment kind of guy with an overpowered magic sword, and one of the girls was a comedy relief buxom clumsy maid, and I deviated from my historical inspirations by ensuring the heroes lived happily ever after instead of dying at the end”.
Fiction isn’t a matter of life and death. The creator of this thread isn’t in charge of a billion dollar company with countless people’s jobs and families depending on him to make the best decisions possible for pleasing as much of the theoretical target audience as possible. This isn’t a kickstarter his reputation relies on. The creator of this thread could make the worst Fire Emblem game known to man and then learn from that mistake and make his next game better. He could even make his next Fire Emblem game bad on purpose as a joke and nobody could stop him. No matter how bad it might end up, it can’t be worse than real games out there being sold for money on Steam and other sites. Anyone complaining about what a fangame developer makes for fun in their own time… would probably be shocked at what gets sold for money these days.
Media Literacy isn’t “If you include something objectionable in your game it must be handled correctly or else”. It’s… https://www.youtube.com/watch?v=AFVRjNG1sSk&t=1s