People get to choose who helps them and how. It is not up to others, in my opinion, to decide what works for someone else.
I don't understand why the op here would want to eat lunch with a therapist. It seems more trouble than it is worth to get food and carry it in to the office and eat while talking as well as being an inappropriate thing to do with a professional one is hiring under most circumstances to me.But, if op finds it useful, then he can see if the therapist minds and have at it if the therapist does not. Not the therapy I would engage in, but it could be useful to someone else. Who am I to say it is not good for op just because I would not want it?