I thought of this some more, and what would be harmful to me in this situation was the dual role as someone who is supposed to "judge", to whom you are expected to perform. In therapy you are supposed to come as you are at the moment and the T is on your side anyway, but if the same T is giving grades, telling exactly how good or bad you are there, it is a supermixed message. I don't care about thinking whether it is ethical or not, but just in practice I would never want my T having that role.