Trauma isn't a choice. However, the way we deal with anything is at least partly a choice, in my opinion. That doesn't mean were always fully aware of our choice or that we can easily choose an alternative, tho.

I make choices due to past trauma every day.
I have problems with intimacy.
I don't like some of the choices I make (well, quite a few, or a lot...).
I know I make some choice out of spite and probably just to treat myself badly, and I know it's because I don't think I deserve better.

I wonder where your T went from that statement. Just the statement alone would have made me angry (maybe exactly because I know it's true, who knows). If expect more from a T than just a statement like this.
My spoyse usee to tell me that a lot, and I could've slapped him,in the face for it every single time. It just made me mad, even after I had realized, yes, every single thing I do is my choice becayse I could act differently....

Does this make sense?

There's a reason why we choose to act a certain way, and its a long road to figure it out sometimes, and maybe and even longer one to find alternatives.