Yeah, IMO these games SHOULD have some sort of romance option. We're playing some pretty old individuals throughout years of their life, and experiencing their memories through their descendants. Literally all of them canonically fell in love or at least sprayed around some kids lmao. Do these people think these characters went decades of their life not pursuing any kind of relationship outside of professionally? Hell, Ezio was canonically a man whore even before we took over playing him if I remember correctly. The flip side to that is that they are all either straight or bi. Either way, any romance is entirely optional, so it's not really hurting anyone to include it. IMO they just need to do a better job writing it.
I also don't remember anyone bitching about Yennifer or Triss. Or Miranda/Ashley/Tali/Liara in Mass Effect.
It also does make sense to include romance in an RPG. It's a very human experience, and people like relating in an RPG. Same reason you get romance outside of romance novels/movies. It's normal.