I'm unsure of the thrust of the question... is current mental health practiced by individuals with an "imperfect translation of a Greek word?" Yes, that is what I am suggesting.

I am not suggesting that we do so.

The essential short coming is more than a simple imperfect translation, however. I believe the essential faculty for effective psychotherapy is empathic Knowledge that allows the therapist to Know, intuitively, what a client needs to discover in order to instruct the client's MIND to releasae what it is refusing to release . This is a particular bit [which I refer to as DbAaMT = dissociated bit of Apapsyche as misperceived trauma] needs considerable explanation. Bottom line, the repressed trauma that needs to be discovered via catharsis.

To effect this, a therapist must have undergone a catharsis of the same DbAaMT within him/herself. To know this, one needs to have a perfect translation.