Just doing MDMA isnt gonna help, especially if overdone. You gotta do the actual therapy work. The MDMA sets your brain in the right state, but the therapy and introspection are what helps.
Ive had personal experiences with mdma and doing introspection, a long time ago. I managed to gain clarity in places i lacked it before. But that wasnt targeted at helping with my Autism struggles.
For Vets with PTSD, they describe it like, the neural pathways in your brain are like water breaking down a path in a rock. The MDMA allows your brain to break those pathways and create new ones.
People who use recreationally are taking way too high a dose and way too often compared to what they are doing with the Vets in PTSD. Its a controlled session with a therapist. They aren’t taking so much that they feel the withdrawals from it. The Yt video i mentioned discusses and this, the rave scene, and the negative effects it had on abusers.