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.
Sure, maybe. Depends where you live. Many places have pretty severe controls on alcohol.
I don't have strong feelings about the appropriate level of control for each drug, I think there are a lot of reasonable positions and I'm not an expert. I just know I shouldn't be able to walk into a grocery store and buy some methamphetamines because I'm curious and I've had a bad day.