Because of how hamfisted they handle it in every single game. Compare Inuqisition to how Witcher 3 handled a gay character.
In Inuqisition you get it thrown in your face constantly about how the character is "so progressive and diverse!" and all it does is ruin immersion. In Witcher 3 they had a gay character who didn't even mention he was gay until you spoke to him a bit more and found out about him, it felt natural and real.
Bioware has turned into a complete joke lately because of all their sexual pandering nonsense and to say Diversity is in demand is an outright lie, gamers don't care about diversity when it purely exists for the sake of diversity hence why so many games that are pandering are getting ignored from gamers that don't want the developers political agendas crammed down our throats. Bioware has became a meme lately with how much they've been pandering in their most recent game.
I couldn't give a **** if a character is straight, gay or some asexual attack helicopter, just give me a good game with a good story and believable characters. If they're gay so be it, just don't make that the basis of the character.
Seriously, what's even the deal with actively pursuing more sexually diverse characters? Those demographics represent such a tiny portion of the gaming community that all it does is alienate your actual fanbase in favor of a group that likely couldn't give two shits about your games.
Just look at the Baldur's Gate Dragonspear controversy and how badly it bit the developers in the ass when they got bombarded with negative reviews only for them to publicly apologize for forcing their political views into their games.
Now I don't know Witcher 3's handling cause I have never played it, but I have surely heard more good about DAI's handling than Witchers. Also doesn't Witcher like have just one gay character in the all of the games or am I mistaken?
Not all gamers care about diversity- just tons of them. It's not anymore world where it's only thought that teenager boys play games and games are made for them only, developers have realized how all kinds of people do. Some of people of the group that was so heavily catered before and now still catered if less so, should realize that. They aren't only one's buying these games.
Fiction is always more and less political. It can speak about real world straight-forwardly or then create certain ideals that can be mirrored. For example Hayao Miyazaki's Ghibli movies, most of them are pretty environmentalist. Marvel is introducing more and more diversity, in terms of race, gender and sexualities. It's not long time ago when comic books were banned from having any LGBT+ characters so there is catching up to do. World is changing to accept and even cherish diversity. Including game studies and gamers. Even though Bioware has been pretty diverse around decade already with Jade Empire having bisexual LI, Kotor having lesbian LI and so on.
Now of course it can be talked how this diversity is portrayed- like OP was talking with his/her first post, but diversity itself in sexualities as in everything else is thing now and hopefully here to stay.