Group therapy and TG Support groups are two different animals. The absolute best therapy I ever got has come from a couple of angels in my "local" TG support group, some 90 miles away. And this is coming from a formerly very private, shy introvert certified nerd. The only therapist I had available at that time was a T friendly generalist a couple of my group members was seeing and even once or twice came to a meeting. (BTW-This was the boonies of western MD). I had a ton of baggage from being trans that I wanted to shed as well as learn better ways to handle my life. Transitioning was not on my agenda. This person was essentially a "Rubber Stamper". If you were stable, you got your CYA letter for HRT. As far as knowing what runs trans peoples emotions, nada.
I have since moved back into the NYC area and now see a for real gender therapist. There is a difference. My goal for therapy, hell even this "Journey", has been to become one whole healthy happy person. The generalist helped a lot. The specialist even more considering how totally complicated and turned upside down over and over my life has been these past few years. We probably spend more time on not directly trans stuff.