You know, this is actually something I've wondered myself. I hear about similar things enough to wonder if being TS or TG may inspire people to learn more about themselves or help others through that difficult journey. While I haven't seen any TS therapists myself, it can be hard to really relate the experience to someone who isn't familiar with the feelings and emotions it evokes. The person I happen to be seeing now is gay, and in some ways it has helped a bit in relating to my problems, so the background of the psychologist can really make a difference. On the other hand, just because a therapist is TS doesn't mean they're necessarily good at counseling, so that's definitely a first priority.
It's something I've wondered mostly because I've had a more than passing interest in Psychology myself and took a few courses. At one point I really thought about majoring in it, but I decided to continue my current studies.
Though I think realistically, most of the work will probably be unrelated to gender identity unless you gain a bit of prominence in the field, enough to become a true specialist. I think its great you're making a go at it though!