For me, if I was seeking help with family issues, I would want a T who had been through whatever stage I was at with my kids. I find that people's attitude is just very different when they have gone through those parenting stages. I found that special ed teachers who had raised kids were much more effective for our son. I would find your T's assumption that she will be a better parent or have more control rather irritating. If she could keep that out of the therapy room, it might be ok.

I have never seen a T who is younger than me. But if they had experience with my diagnosis, I would give them a try.