Well, the psychiatrist is wrong and what he/she is saying is that he really is not an expert in PTSD and trauma work.

Trauma is something that one never forgets, trauma work is to help an individual process the trauma and slowly learn to manage the effects of a trauma.

It is understandable that you have certain things that trigger you, it's important that you give whatever the trigger is time to surface so you can identify what the trigger meant to you. It does sound like you have really gained on managing a lot of the trauma you have experienced and have been working and providing for yourself again. When a trigger does happen and you identify it, that means you can begin to slowly work on having thoughts that help that "still sensitive area" to gain a sense of personal calm inspite of whatever it was that triggered you.

You are correct, often professional's lack when it comes to respecting others and genuinely understanding "human nature". That can happen in the medical field as these individuals begin to develop their focus "away from" the patient towards just seeing each patient as another "number or task" and then just move onto the next patient as if these patients are merely objects. Often these individuals develop a disassociation from the different patients not even realizing they are doing so.