Read more carefully: The idea that Prohibition was repealed because "it wasn't working" is a pothead myth. "Prohibition was a great success" is your own personal opinion, not mine. Maybe you need to think this one out.
You claim “alcohol prohibition wasn't working" is a myth therefore alcohol prohibition must have been successfully working (in your mind) - that would make it a success (based on your logic). Your only point of argument would the word "great"
Your statements are not very well thought out - you shoot from the hip.
Alcohol prohibition is was dismal failure just as marijuana prohibition is a dismal failure.
Wrong again. I claim that Prohibition did not end because it wasn't working. It ended because a majority of Americans disagreed with the law. That is exactly the way it happened. You are the one trying to tie the end of Prohibition to its success/failure. Unfortunately, that's not the way it happened.