I always find this line of reasoning completely disingenuous. Either the romance content is good or it isn't. The sex of the PC/NPC doesn't change anything.
People that say "all playersexual romances are bad" or that "characters with a set sexuality are sooooo unique and outstanding" are just using made up talking points they think support what they wanted. Either the story is engaging and the characters are presented with depth or they aren't. I can't stand when people boil everything down to which set of genitals they insist be rubbed together.
If the devs had unlimited resources to make dozens of quality romance-able characters that players could pick and choose from, fine. When you have a very limited set of options though locking them out based on arbitrary decisions the player makes during creation is just a waste of resources.
Never said they were bad. Just personally thought they were boring.
Simmer down.