I think a lot of actors probably do care about how their characters are written. Sure they are collecting a paycheck and following director’s cues and know it’s just a show, but they must have an opinion about their storylines and want to make their characters believable with good dialog. It’s only natural.
coming out in interviews stating whether they like or dislike a story line have been JS and JM. Both have no problem expressing their opinions with how they are written if, in fact, they are not happy with the writing or their s/l.