I think what's meaningful is not that your T said them or that you know he did so to make a point, but your response; your willingness to assign those words to yourself and to take on the accompanying hurt from the words and from the words being said by T.
T was not directing those words/thoughts at you, but speaking them in your presence felt like that to you. When we are willing to take on hurt, to redirect it toward ourselves, to change what's real to what's not real, that is something valuable to explore and learn more about.

I used to be bothered by 'guilt by association'. If a teacher or boss, for example, made a general statement to the class/group about unacceptable behavior or work, I would blush on the spot, feel lightheaded, become short of breath every time. Adrenaline, resulting from the fear reaction. I was not the person the statement was being directed toward, but I was willing to 'be' that person, to take on the guilt. Great kind of thing to work on in therapy.

So, you have been given an opportunity to learn more about how this works with you.