Earlier quoted context omitted.
Desomorphine seems kind of bad, even without the other nasty effects when it is homemade by people who can't afford the real thing (i.e. Krokodil). https://en.wikipedia.org/wiki/Desomorphine > While desomorphine was found to be faster acting and more effective than morphine for the rapid relief of severe pain, its shorter duration of action and the relatively more severe respiratory depression produced at equianalges…
But definitely isn't worse than alcohol and fentanyl and 6MAM are both used medically. The damage from krokodil, as you mention, is from the impurities. Not to mention, krokodil wouldn't even be a thing if people had access to the usual schedule 1 substances
...at a price they can afford. Otherwise it still would be a thing, regardless of schedule 1 legality.