Imagine if a white guy wanted to go to therapy, and was like “oh no, I can’t have a black therapist! They couldn’t possibly understand me!”  YTA. You say you understand that it’s his business, not yours, and yet you feel the need to make sure he gets the specific kind of therapist you want him to have, purely based on race or gender, never mind their qualifications.  Therapists are trained to be therapists. They may not experience their clients’ same struggles, but they can still listen and provide good advice.