Assuming that frogs grow wings, then they will stop dragging their posteriors on the ground.
It takes a little time for something like that to catch on, and for the novelty of paying so much for store bought, to wear off.
What "novelty"? Pot smokers have been buying rather than growing for decades.
The difficulty of hiding plants seems to be about the only obstacle to growing them, since pot is becoming legal, we can assume that growing it will become legal or decriminalized at some point.
Since you seem to know, tell me the statistics on how much pot growing was taking place in Colorado before the drug was legalized, and how much is being grown now.