I agree, I don't think the doctor is intentionally fear-mongering. I think this doctor is probably just biased from his own second hand experience with a very, very small and unrepresentative portion of MDMA users. Misguided.

My issue with the doctor's statements is concerning only the potential for abuse/addiction (which is not even worth talking about when compared to opioids). The potential for harm is definitely worth being cautious over.