Like, every author or video game maker of violent projects would have to suspected for planning murder, lol. All those horror movies full of brutal, realistic gore => writers are psycho-killers in spe!!11 /s
Fiction ultimately is always about "what if ...", that's what makes it interesting. If we have a story where "grooming" is okay, where slavery is okay or where the age of consent is lower than irl, that makes for interesting scenarios, that allow stories to explore what it'd be like. ESPECIALLY when it's an isekai-story where someone from our real world is confronted with these different norms. And there shouldn't be any obligations on the writer to have the hero behave only one way.
Hero is reborn in world where slavery is okay. Now he can react in various ways:
- "OMG, are you insane? Slavery is wrong!!111"
- "Omg, this world is fucked up. I need to get back asap!"
- "Damn these people, I can't let this stay as is. Gotta find a way to end slavery, it's the right thing to do!"
- "Fuck, I'm powerless for now. But I can at least accept that slave the lord gave me and treat her well."
- "Well, this a different world. And having a servant isn't so bad."
- "Hm, now that I think about it, she's kinda cute. But I must behave." *slave girl falls in love with hero*
- "Wait, 'tis for real? And I'm allowed to do aaaaanything I want to her? BUENO...!"
And ANY of these should be okay to write, without accusing the author of anything. All these taboos are the reason why movies and video games are so goddamn boring nowadays. Heroes aren't even allowed to slap an unsuspecting girl on the butt anymore without outrage. Breaking taboos => more exciting stories <3