CBT encompasses many aspects, relaxation, trauma therapy, management skills, exposure therapy, etc etc.... all encompassed into the CBT model. CBT is a term given to teach a person skills that they can adapt to themselves for the rest of their life. Fear has to do with trauma, relaxation skills is not going to remove your fear, facing your fear is what removes your fear, being trauma or exposure therapy. The other aspects of PTSD are not about trauma, they are about management skills you will require the remainder of your life.

Now, saying all that.... a therapist should never teach you one thing in one area, because you cannot blanket the world as one thing works for everyone. If a technique doesn't work, and you have tried it with no avail, then you must tell your therapist so they can deliver another one to you for a try. You continue the cycle until you find what works for you.

Example... all that relaxation nonsense just never did anything for me, nothing at all. I tried and tried, but nothing. So the point was to relax.... OK, what do "I feel" relaxes me best? Maybe its a board game (not computer game), maybe a walk, maybe chilling out watching cartoons, something that is soothing and not destructive or could cause frustration.... hence at the completion off 30 minutes to an hour, I am totally relaxed. It could be going to mow the lawn, I am alone, in my own world, exercising, doing something constructive, but at the end I am actually quite relaxed as I enjoy it.

It is not about what works for someone else, but instead what works best for you to achieve the goal... relaxation being that goal.