Every other game had backstories that were completely beyond the player's control. You don't control who your father is. You don't control whether you are shot in the head at your job. You don't control who your grandfather is.
You DO control whether you are married, and whether you care about that spouse, and well, whether you care about that son.
In Fallout 4 - you care about that spouse. You care about that son. Your dialogue choices are either "Concerned father and grieving husband" or "Sarcastically concerned father and grieving husband". The most you can do to avoid being this family man is not doing the questline at all. That's ok with you. I get it. You are ok with this game becoming like every other game on the market.
I'm not.
Look, reframe it like this and maybe you'lll get it. Instead of "Fallout 4 doesn't let you be gay" how about
Fallout 4 doesn't let you be single.
Fallout 4 doesn't let you be young.
You can't be a 20something playboy. You're a middle-aged father, a widower no less. You aren't you. you aren't in a Fallout game, with a non-named protagonist that you build out the way you want to. You're in a Square Enix game now, and you aren't even getting Square Enix class storytelling.
So, perhaps you and I will just have to agree to disagree on this point. I think what they did with the named and voiced protagonist cost us too much in terms of what made Fallout, Fallout.