I think it depends on the client the T is seeing. Personally, I want to feel accepted by my T, and if I'm making or I made bad choices, or had a negative behaviour, I don't want my T to tell me "Look, you did something bad!". A T can say to me that I had a negative behaviour but with a right choice of words...you can disagree with someone by using gentle words, that's how I would want a T to react (and not by yelling at me, or by pointing things at me like when you speak to a child).
I also think that maybe some clients prefer this way, maybe other clients want the T to be straighforward, that's why a T has to change a bit based on the client (maybe a T can be straightforward with client1, and more "cautious" with client2). I think a T has to adapt their behaviours and their talks based on the clients.