Now with that said, crack, meth and heroin are not "social drugs" and are not compatible with a healthy society. They are strongly addictive and cause permanent damage. You might disagree (and that's fine), but I don't see how making those legally available outside of addiction treatment facility will lead to favourable societal outcomes in any meaningful way.
Honestly, I don't think anyone can seriously claim it is anywhere near as bad as alcohol, other than in two regards: smoking isn't great for you (but that's a method problem, not a substance one) and the smell in public (which is a minor issue and, again, one that can be mitigated).
By any other measure - addiction, short-term and long-term harms, indirect harm to third-parties - alcohol is worse.