I think it is a good thing the OPs therapist did not act in a judgmental fashion.
I have found some people who work in the hospital wards or institutions often treat clients badly and are very judgmental. Nurse Ratched types are not uncommon. It is usually fun to cross-examine them. I have not found the average therapist is going to get all that worked up about some pot use.

OP - do you want to stop smoking?