My first T did major wrongs repeatedly, some perhaps mistakes and due to lack of attention but some were so weird I could not imagine he was not aware of it. Never apologized, never once. It was one feature that made me really dislike him and even think he must have been rather dumb in the end. My second T rarely did anything I considered actually wrong, he was definitely quite thoughtful and much more realistic, but in the couple cases when I pointed out something I did not like, he apologized and did not repeat the same thing again.

I do not understand why many Ts refuse to apologize - I consider that basic human decency and communication skill. I heard some say that they do it to have the client sith with their frustration, even elicit it, in order to explore the associated emotions. I think that is just twisted and inappropriate.