The non-disclosure of most phychotherapists (not CBT) is to encourage the development of transference, to varying degrees.

So that, during therapy, we project our pasts "issues"'on to our therapist and, in the best circumstances; "work through" these issues and enhance our functioning in our current life.

Some us do not want transference to develop, but that is, essentially, the function of non-disclosure, as I understand it.

Some of us are embroiled in various forms of transference in our therapy. Some of us, have no emotional attachment at all to our therapist

We all go to therapy for our own personal reasons. We all respond to our therapists in different ways.

Neither one is right or wrong, simply unique to the client.

My opinion only.