This is a false belief.
You absolutely can, and should, make the conscious decision to be more like X in your everyday life, where X is how you behave under the influence of MDMA.
I had the same problem, and got a horrible down when the drug wore off, UNTIL I realized that what the pill actually does, is SHOW ME WHAT I'M CAPABLE OF FEELING. The very INSTANT I believed it was possible, all bad feels disappeared and I was left with an afterglow that lasted for weeks.
It's not a downside of MDMA, quite the opposite; a reflection of your own weakness, the knowledge of which helps you fix it!
The feeling of bliss should come from a successful relationship with others, not some drug.
According to here[0], you are quite correct:
Amphetamines are a class of psychostimulant drugs that are widely abused for their stimulant, euphoric, empathogenic and hallucinogenic properties. Many of these effects result from acute increases in dopamine and serotonin neurotransmission. Subsequent to these acute effects, methamphetamine and 3,4 methylenedioxymethamphetamine (MDMA) produce persistent damage to dopamine and serotonin nerve terminals. This review summarizes the numerous interdependent mechanisms including excitotoxicity, mitochondrial damage and oxidative stress that have been demonstrated to contribute to this damage. Emerging non-neuronal mechanisms by which the drugs may contribute to monoaminergic terminal damage, as well as the neuropsychiatric consequences of this terminal damage are also presented. Methamphetamine and 3,4-methylenedioxymethamphetamine (MDMA) have similar chemical structures and pharmacologic properties compared to other abused substances including cathinone (khat), as well as a relatively new class of novel synthetic amphetamines known as ‘bath salts’ that have gained popularity amongst drug abusers.
There are also studies using it to treat PTSD in veterans.
A great place to look is Tim Ferriss' podcast episodes about psychedelic therapy. He has two I can think of, and one has a few great anecdotes. From him you'll find many others. Gabor Maté is a good one to check out. He uses psychedelics extensively in therapy and has for quite some time.
One woman I listened to (I believe on Tim's podcast) detailed how her and her husband would take MDMA (I believe) every year or so and talk things out. Whether things were good or bad. She describes herself as the last kind of person you'd expect to see taking illegal drugs, but here she is, and she believes it has made her marriage far better than it would have been without them.
There are countless similar stories.
Hope it was the other commenter who down voted me.
> In follow-up psychotherapy, patients process emotions and insights brought up during the MDMA session. The current protocol calls for patients to take MDMA two or three times, each a month apart, interspersed with psychotherapy.
> “The MDMA alone or the therapy alone don’t appear to be as effective,” Dr. Mithoefer said. “The MDMA seems to act as a catalyst that allows the healing to happen.
https://www.nytimes.com/2018/05/01/us/ecstasy-molly-ptsd-mdm...
[0]: https://www.reddit.com/r/DrugNerds/comments/15m9sf/mdma_supp...