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.
They did a study in portugal. Before they decriminalized everything. They let heroid enthusiasts just use clean safe heroin as they could manage. Like, you could get a dui, but you couldn't be fired for failing a drug test. They made sure they had a constant clean supply with no legal issues and the people managed to be productive members of society. Held down jobs, paid rent, proper citizens.
It's not ideal. But it is far safer than any alternative than has been tried.
Turns out the worst thing about drugs are the cops.