The only one making that argument is the voice in your head. You make that argument every time you bring up the problems with alcohol. There is no other legitimate reason for you to bring up the problems caused by alcohol other than to point at it as justification for your favorite drug.
I have distilled your argument into it's essence, right here.
"WAAAAAAAAAH!!!! They get Alcohol! I want my WEEEEEEEEEEDDDDDD!!!!!"
That is exactly what you are saying.
Eva:
Associated with the sale of marijuana., and as the incident in CA shows, it won’t stop the violenceAre robberies of liquor stores "violence associated with the sale of alcohol"? Are they a good argument against legal alcohol?
There is no other legitimate reason for you to bring up the problems caused by alcohol other than
Your reading comprehension is poor - the reason here clearly was to point out the weakness in Eva's major premise.