I don't have a traditional work environment (academia) and I rarely need to discuss my colleagues in therapy.

But the issues I go to therapy for, not therapy itself or a therapist's bad advice, do sometimes spill over into the workplace for me insofar as they make me tense or edgy. Not what you asked, of course, but I think therapists think of clients and workplaces in the sense of how the client relates to people, not how the other people are relating to the client. This does mean they don't stop to consider maybe the other people have problems too.