I lived with that fear with one therapist. It was completely insane. I was a powerless subordinate to a semi-stranger who was collecting my secrets. Living in fear of the other person in a relationship does not seem very therapeutic, seems more suggestive of abusive or otherwise pathological relationships. It's unreal that therapists conduct such relationships knowing the client has these fears, and one has to wonder what the therapist gains from this massive power differential and whether realistically they can avoid abusing it. Power corrupts, etc.