What gives society the right to choose for me what I may consume for myself?
However I can argue that we should think twice before to make legal something that get you addicted with the first dose and mess up with your brain in a so heavy way.
(Yes I do know about alcohol but it is a cultural and, by the way, different issue)
Comparing alcohol and cocaine is absurd, alcohol by any reasonable measure is just about one of the hardest drugs there is, and causes massively more societal harm than cocaine.
But we are supposed to make it a special exception because it's old? All that really amounts to is "Lets ban this because people who seem alien to me use it, but lets keep this other thing legal because 'normal' people use it." It is a xenophobic argument.
My point was simply that "heroine and cocaine are so dangerous that we have to keep them criminal" is not necessarily a valid position. Your point, which seems to be that such changes should not be made in isolation but supported by other policy measures, is certainly one that needs stressing as well.
What's the big deal of replacing one cartel with another? I mean, I understand that's what's inevitably going to happen - it's just sad to see widespread kowtowing by deillegalization supporters sucking up to power.