I would be very leery of any therapist that "rendered a verdict", either way beyond somewhere on the TG spectrum between cis-male and cis-female. I doubt any CD never questioned their true gender. Just being a CD has to beg the question.
Some people are absolutely sure transitioning is the right route for them. Some people's lives are in free fall dealing with the GD, so much so they cannot even hold down a job they were doing for many years. I've seen them come into my group. There was no other way they can bring some sort of balance back into their life. There are other's that may "Question" yet on the whole they like the escape of being a CD, like a vacation (I am guessing). After it's over it's no big thing to get back to "Life". There are others, like me, that go well beyond "Questioning" since an early age. Yet somehow most days can strike a balance between all the aspects of life that are important.
A therapist's main purpose, as I see it, is to help you find your "Answer" or answers. To moderate. To instill some additional knowledge. To ask you the questions you may not want to be asked, or didn't even think to ask. To point out some of the possibilities or alternative endings to your decisions. Endings which may be based totally on wishful thinking. Which is OK. Nothing wrong with having hope.
Eight years after I saw I needed to take the Trans-Beast on for real with many of them seeing a therapist, the last 4 with a for real gender therapist, I still don't know the best answer for me. I still am able to find a balance in my life juggling all the aspects of it that are important to me, my totality as a person. Yes, I have bad days, but how many cis people don't have bad days? I sure don't know any.
BTW - They also agree totally I am TG.