My T has told me that a LOT of people don't stay long term for treatment. They come in for a session or two (or 3 or 4 or 5) and then are never seen nor heard from again. Maybe the reality of therapy hits them too hard and they realize they aren't ready or simply don't want to.

So with that, I would think there wouldn't be any time to get emotionally involved with a client that you don't know? It's when you continually see the same client over weeks and months and years that a relationship develops and you invest in their emotional and mental health. I would imagine that good self care is an absolute must (like Stormy said) in that case.

I really don't know though, to be honest.