In my humble opinion Larian did the best decision to add romances and more humane aspects like such into the game, besides Larian as a studio have multiple teams, concept artists, programmers, scripters, enviromental artists and whole other division of artists, list would be too long to mention.

I'll throw in for sake for debate that by not having romances in the game, could have left a portion of studio artists workless or either rather than having said resourcces poured into the game could very well have just been another part for fallbacks instead.