Sorry, with the end of your sentence you discredit yourself.
In a psychopath there is no brain activity in some parts of the brain. See story of James Fallon as mentioned in numerous sources on the subject, including this article. Psychopaths don't 'deny' themselves emotions. Psychopaths are unable to experience the full spectrum of emotions. Examples of emotions include love, empathy, anger, despair, fear. They learned to mimic the emotions they're unable to experience, in detail, so a psychopath will seemingly be able to experience fear (acting as if they do often referred to as 'wearing the mask'). They're like predators in a land of prey, constantly on the hunt, yet well disguised (I attribute that sentence to Hintjens' theories on the subject). Neurotypicals normally do not detect them. A person who denies themselves emotions is someone with deep-rooted psychological problems. That's not a psychopath as psychopaths are unable to experience the full spectrum; that's someone who likely has a personality disorder or (if a young person) is developing one. Personality disorders cannot be cured. A personality disorder is for life. It may become worse or better, therapy such as CBT or drugs can make the personality disorder bearable, but it never fully goes away. That theory makes it unlikely full-blown psychopaths can be cured, while the corner cases stay in disguise.
As for being 'unaware' of their emotions. There's evidence psychopaths can recognise emotions better than neurotypicals [1].
We should also seriously consider the long-term effects of MDMA in relation to health. E.g. neurotoxicity. Quora contains an entry on this subject [2].
[1] http://www.theglobeandmail.com/arts/books-and-media/surprise...
[2] https://www.quora.com/What-are-the-long-term-side-effects-fr...
MAPS has a goal of 2021 for prescription.
>MAPS is undertaking a roughly $25 million plan to make MDMA into a Food and Drug Administration (FDA)-approved prescription medicine by 2021.
Psychedelic therapy has been practiced virtually since psychedelics started to be widely used in the mid-20th century. In the 1950's and 60's, LSD and other psychedelics were used therapeutically. In the 1980's, efore MDMA became known as a party drug, it was used therapeutically. Indigenous people have traditionally used psychedlics in a sacramental context in which goals and results could arguably be seen as therapeutic.
When these drugs were made illegal, the above-ground therapy stopped, but some therapists dared to continue their work despite great risk to themselves. To give just one example, a book called *"The Secret Chief Revealed"[1] chronicles the work of one such underground psychedlic therapist, Leo Zeff, who led hundreds of therapy sessions with MDMA.
Today the practice of psychedelic therapy continues, and there are even university programs that teach it. It's still mostly underground, but is starting to rise aboveground and becoming a real option as research in to psychedelic therapy gets positive results and positive media coverage, as more doctors and patients become aware of it, and as the so-called Psychedlic Renaissance grows.
[1] - https://www.amazon.com/Secret-Chief-Revealed-Myron-Stolaroff...
That might be "obvious", but isn't necessarily true.
Many people these days believe that the brain is the mind, or the mind is an epiphenomenon of the brain, and that psychology and brain function are intimately connected, or even the very same thing. On this view, to the extent anyone has free will and is able to change anything about themselves, they are changing their brain.
One method of change that would be interesting to explore is seeing what effect "empathogenic" drugs like MDMA (or perhaps other psychedelics) have on so-called psychopaths. It might just be possible that they are in fact capable of feeling empathy, but those feelings aren't consciously acknowledged or easily accessible to them -- but some powerful psychoactive substances like MDMA or psychedelics might be able to grant them access to their subconscious and to learn to be aware of emotions they've either been unaware of before or have denied.
Of course, such attempts should be tried only under the supervision of an experienced therapist trained in psychedelic therapy.