Retribution provides almost no societal benefit. Most of society doesn’t know or care about any individual crime. Rehabilitation of a single member however will benefit all of society, as you can’t predict all possible social interactions of a single person.
1 in 100 people (or os) is schizophrenic. It's quite predictable what happens when a schizophrenic person takes psychedelics. I am not saying this is your case here. However, if anything your single case example shows inadequacy in the health- and social care systems and not unpredictability of DMT.
If a person hadn't experienced a debilitating depression it's hard to imagine what another person is experiencing. All those walks in the park and hobbies sound logical and wonderful, on paper. Reality is a bit different.
Both engineering managers and engineering project managers are results of an obscure or non-existent vision. When you don't know why you have an oar in your hands you need a person with whip to remind you.
"Three groups of patients could be identified: 79% stated that their personality had not changed at all postoperatively. In this group, patients showed masslve defense and denial reactions, mainly by rapidly changing the subject or making the question ridiculous. Fifteen per cent stated that their personality had indeed changed, but not because of the donor organ, but due to the life-threatening event. Six per cent (three patients) reported a distinct change of personality due to their new hearts."
https://link.springer.com/article/10.1007/BF00435634
I think you started great, but didn't follow through on your own thought.
"learn to help each other solve problems"
The most important problem we need to solve, is how to survive in the universe, where any large rock falling from the sky can wipe out our civilization, if not the whole mammalian branch.
We don't have to abandon efforts to improve human life on this planet while trying to expand to more than one.