I think it would have to be an overall attitude, not a one-time thing for me. My T has asked is there "any point" in our continuing with a session. I think if I wasn't trying to do therapy, was dug in about something and couldn't or wouldn't shift my mindset/attitude then she'd not want to continue. I think a DID alter(s) who was in the way like that would be similar. I would do whatever I could to make sure someone who was interested in using the therapy session in a positive way came out instead of those in charge of protection or who had a chip on their shoulder and were just arguing.
T's don't generally say things just for their health :-) and even if we have heard things before or don't agree with what they've said I know I'm always too quick to reject things at first, sure they won't work or that they're not for me, just because I don't "like" an idea and often I'm the one who hasn't ever tried it or hasn't thought of it in this context, etc. Something suggested has probably worked for other people like me or for other people in situations like mine or it wouldn't be suggested. Like any other gift from someone, "thank you" and then doing whatever with the information or thinking about it later, etc. is not a bad habit to get into. T's cant make us do anything, can't make us want to come or move things along if we refuse. It's our therapy and we have to take the raw material our T gives us and make something with it. Throwing the egg at the T instead of making pancakes with it. . .