This. Slavery was a core theme from the get-go, and most of the characters we meet are directly involved in it, whether one side or the other. The outcome of potential liberation effects so many main, side, background characters and even us the player, as well as the world the game takes place in.
Just because wandering into the shower one morning and boning whoever's there because you're horny isn't related to slavery, doesn't mean the game is separated from the story.