What makes it even more bizarre is that they give you options to aggro both Shadowheart and Gale. Although you can avoid the wrestling bit if you pass a perception roll. Still just very strange in general, I do not like a lot of the writing choices regarding Astarion.

“But his mind saw nothing of all this. His mind was engaged in a warfare of the gods. His mind paced outwards over no-man's-land, over the fields of the slain, paced to the rhythm of the blood's red bugles. To be alone and evil! To be a god at bay. What was more absolute?”