If you legalize marijuana on constitutional grounds — which I agree with — then I don’t see what justification there is to outlaw heroin, crystal meth, etc.
Nor I. Also matters for the states - none of which appear to be champing at the bit to legalize heroin or crystal meth.
If a state wants to legalize meth, heroin and other such obviously bad substances they would be committing political as well as population suicide. Thus, I don’t really see that happening.
IMHO, pot is far less harmful than alcohol and the so called gateway drug argument is for the simple minded. I know of many who smoked pot in their younger years and now are upstanding responsible citizens — I would prefer this path than alcoholism which we all know is a life destroyer.
God Bless!