I don't understand the angst over whether the therapist is genuine or real or whatever. The therapist is a tool the client can use. Not the only tool, but one sort.
If the therapist seems sincere to you and you want sincerity, go with it.

It reminds me of this from Bull Durham:
Crash Davis: I told him that a player on a streak has to respect the streak.
Annie Savoy: Oh fine.
Crash Davis: You know why? Because they don't - -they don't happen very often.
Annie Savoy: Right.
Crash Davis: If you believe you're playing well because you're getting laid, or because you're not getting laid, or because you wear women's underwear, then you are! And you should know that!