Most therapists I have interacted with could not even tolerate questions about their method or process. Inquiring into their mental health and the extent to which they have addressed their own personal issues… I'm guessing that rarely happens, and when it does I'm guessing majority of therapists evade the questions, as is their habit.

I bet most of them are pretty delicate emotionally and react to many things. Seems what is considered a "good" therapist is the one who can disguise their natural reactions or suppress them by force, which can't be healthy. And seems the absence of visible or recognizable "countertransference" is taken as evidence of its actual absence. I suspect some of the are doing crazy internal gymnastics to stuff their reactions down. In any case, how can the client possibly know what is happening with the opaque therapist, especially if the client is in distress and not able to carry out a systematic assessment of the therapist's psyche?