I'm talking about the normal give and take that occurs in other close personal relationships. Trust is established through reciprocal disclosure and shared vulnerability. If there was a support group or social group where one person rarely discussed their true feelings or their private life or their personal struggles, the group would view that person with suspicion. My last therapist, even though she disclosed more to me than her other clients, withheld all sorts of things that later emerged and caused a lot of harm.

The other info that is consistently withheld, in my experience, is detail about the risks involved. This is deliberate and is antithetical to building trust. Almost every therapist I have seen has skipped this. In the first session I was expected to just start divulging personal material while they silently consumed it. I would wager that most therapy clients sense a distinct unease somewhere in their body when doing this, and yet override the feeling because the structure of therapy demands it.