IMO nothing touches opiates as far as addiction potential goes. That shit becomes as important as food, water, and sex to an opiate hijacked brain.
Still, yes I think they should be completely legal. Legalizing these drugs would completely destroy the black market for these drugs and greatly mitigate deaths from shit like fentanyl and carfentanyl.
it's the very self-destructive behavior that comes with addiction that's the problem, the question is whether or not or to what extent you believe a government should protect individuals from themselves