Everyone has their fetishes, turnoffs and different sexual orientations so if you plan to add a bunch of the themes mentioned you really should also let people be able to turn them off in the option menu so the game is not ruined for those who are turned off by one or more fetish/theme. Who'd want to play a raunchy game that grosses you out? For me for example the mentioned trap, gay and futa content would ruin any game. For someone else it might be the best thing in the game, but maybe it's the mentioned impregnation ideas that they don't care for. The only two ways I see to keep everyone happy is to either aim it at the narrow demographic that happens to like all the content you plan to add and make very darn sure people know about all the planned content before buying, or simply make the content optional. Well the hidden third option would be to not add any fetish stuff at all that people might dislike and go vanilla as far as possible but that would probably be a bad choice I think since the most vanilla and generic themes possible is still not for everyone and it would probably make the game more generic as well.
TL;DR ~ Letting the players disable the themes/fetishes that are not for them is good. Thinking everyone is bisexual and don't mind seeing fetishes they don't have themselves is bad. If you can adapt the game to accommodate the different likes and dislikes people have you can have a game that more people can like.