I think because it's a loss. It's the loss of something you value. As someone who totally misses rooms and objects and has a hard time with certain changes I hear you. It's the lost of something comforting and healing. You need to process this and therapy is the place to do that. Sadly your T has locked down on what is and isn't ok to discuss. Maybe try talking about it in terms of what you feel, why you feel it and ways to help heal. Give it time, you will move past this.