You mean, like, like Dwarves romancing Elves? Or, like, exchanging emotion-filled embraces with that attractive Monk? Or Engaging in playful flirtations with your party's Sorcerer while exploring ancient haunted crypts filled with deadly traps and flesh-rotting Ghasts who want to feast on your bones?
Romances don't *fit* in games like these. They are thematically at odds. THAT is why people are ditching them on principle.
I do not think there is anything about this setting that "thematically" demands celibacy, particularly if the developers have expressed their intent to "delve into a more mature subject matter."
If they just don't have the time to extensively write romances, fine. That's a good reason. But as for the general distate for writing romances, c'mon. CA admitted that he's fueled by what he hates about a genre or a setting to play around with it. This is a perfect target for him.