Suggesting that the cycle of abuse can't be talked about in relation to this in the game is simply a way of trying to hamstring opposing opinions.
"Why don't you like it? For this reason? Oh, but you can't talk about that reason."
A truly weird take tbh, great storytelling in games is adaptable storytelling, when making an action causes an appropriate reaction. I can't see how banning the player agency can ever be a good thing, unless the whole idea of losing agency serves the plot. Here it doesn't, because you can still murder Astarion afterwards or ditch him to eat dirt at camp, you are not being held captive or something.
