I think a distinction should be made between the therapist retraumatizing someone, and the situation retraumatizing someone. If a T, through incompetence or harmful intent, traumatizes you, that's on them. If you get retraumatized because of normal (trauma) therapy, that she couldn't know not to do or couldn't prevent, that's not on the therapist. In that case the situation was retraumatizing, not the T.

A few pages back I described a situation with my pdoc that was definitely retraumatizing. However, he didn't do anything he shouldn't in general. I know his intent was to keep me out of the locked ward. HE didn't retraumatize me.