My T says the same thing and I wondered the same questions you ask.
But I think it is because T is trying to give us permission to feel.
He says to feel is to heal.
For me, I grew up and was abused by my father. But I was never allowed to be mad at him. There was always some excuse for his anger or other behavior. I had to hear my T tell me I now have permission to be angry at my father.
For some reason, that has now opened the door to allow me to be angry with my father.

Just realize that even though some of the things T says might not make sense to us at the time, they are talking to our whole person and not just our conscious mind.