Except for limited resources.
Few pages of dialogue won't consume much of the resources.
Romances in BG2 didn't work like that, they were branching. Every time you offer a new choice in a dialogue it potentially doubles the content. You don't just copy and paste them from MS Word, they need to be scripted into the game. It's more work than you think.
Just like any other dialogue with companions. Should we just cut off every companion and replace them with custom companions to save money just because some people don't like companions? Seeing how much people like romances in BG2 it's not a bad investment.
Simple romances are a burden on resources. When your bioware with $20mil in resources, you can add six romances. When your Obs with $3-4 millions, you can't. Accept that and move on.
Story, branching pathways, factions, lore, class design, system design, encounter design, etc are all more important than romances. Yes it's my opinion and I really don't care if you don't agree with it.