How would addressing more serious topics in a fantasy setting be less options or less roleplaying?
The Witcher had a crude and simplistic way of doing it, but at least they tried. If you want to do social commentary of a sort there is a host of issues that would take precedence over homosexual romances.
How do you know what other issues are in the game?
Also, it's not an "issue", it has nothing to do with gay rights. It's about providing you with the options to better flesh out your character, should you so choose.
EDIT: There isn't a list of issues, listed by their importance that every game developer should tackle in their game. They put whatever they want in their game. If one is unhappy about them, one can vote with one's wallet.