You're right. I'm all for across-the-board decriminalisation btw. But I don't really know where a responsible balance would be for psychedelic availability, my intuition is we shouldn't be aiming at OTC disposable DMT vapes etc.
The only way in the US is to have a powerful lobby that can fight to ensure broad waivers stand up in court, like the NRA: you can buy a gun and literally shoot yourself in the foot.
But if transaction, money, service, profession are all removed, then under a co-op / non profit this might work. Of course, those structures are also vulnerable to well-funded legal opponents.
Some European countries do provide a framework for this but it's more from a public health perspective and to eliminate the raison-d'être of criminal drug organizations.