So you are also against legalizing automobiles - because people would still steal cars they don't want to have to pay for? I guess that the same would also apply to cigars, espresso, or Tic-Tacs.
That's your logic.
Marijuana [Cultivation?! Possession?! Consumption?! Please be specific!] is not a "victimless crime."
That bold assertion came out of nowhere - i.e., it is a non sequitur (= "logical fallacy").
Regards,
Your thought process is screwed up. Owning a car has always been legal. Using and selling a drug hasn't been.