I'm sure it can help, if someone has confusions or concerns, or needs to address other issues that their gender problem has prevented them from being able to address.
I never really had Therapy - instead like Naturally Blonde, in the later 1970's I fought a full thermonuclear war with one psychiatrist (John Randall), and then a few years later more or less fell in love with a different psychiatrist who remains to this day one of my best friends.
Niether of those extremes is probably medically ideal - but from the first I got no help, just a lot of pain and suffering, whilst from the second I got lots of support and understanding, and more importantly because he really listened to me and correctly understood where I was at, he cut through all the red tape and gave me my life back!
Would it have helped me to spend a lot of time talking? No! I am absolutely convinced that, for me personally, it wouldn't. I always knew what I was doing, I knew what I wanted and why. More importantly because, by fluke or incredible luck, I had effectively transitioned in childhood I didn't have any other blocked up problems.
But for some people yes I think it probably can help. This is a big step. You want to be sure that you know what you are doing, why you are doing it, and that it is right for you.