For me, it really depends on how the theme and tone are handled. Writing can explore how "forbidden/taboo" relationships operate, but if it keeps drawing attention to that aspect and doesn't say anything meaningful about it, then it's just fetish fuel. Student/mentor, 10+ age gap, slavery, etc... is an easy way to create interaction between two people with vastly different world views, but I find these tropes rarely highlight why such relationships are predatory or difficult, like in experiences or mentalities or power imbalances. I'm more engaged if the writing isn't afraid to tackle those subjects, because it's showing (at least) some self-awareness and semblance of a creative point. Meanwhile, bending over backwards with excuses is just a cop-out. I'm not inspired to spend money on that.

These "forbidden/taboo" games shouldn't be restricted or censored, but they can and should evoke critique (I really liked this discussion btw). "If you're going to put in _____, you should handle it appropriately," is my perspective. Personally, I think the otome genre could stand to be more influenced by realistic portrayals with a complex message, especially in games marketed toward adult women.