We are using more energy psychology in the field because fears (yes, anxiety is fear) are often how our problems present themselves to us. Fear is triggered on a very primitive level, and for that reason it's difficult to be "talked out" of it. Intellectual assessments hold little weight and have failed in trauma treatment for years.
To illustrate: If our minds were computer desktops, using talk therapy on trauma would be like searching for a specific file and clicking on the wrong folder to access it. It's ineffective. You don't just gain access to the material you need by looking: You need to look in the right place.