No, I do not think the therapist likely things you were not affected. I think it's more likely they see you were so deeply affected that you don't respond in the typical or cliche ways because of how damaging the experience was. That's how I have experienced it anyway: I went through a lot of early therapy dissociated and shut down, anger was a dangerous thing to show, so I didn't. Sadness was an embarrassing one so I didn't, etc. If you really sense that your therapist may not be getting you though, perhaps show them your post here.