This is step that, once taken, there is no way back.
Kind of like when we ended most of prohibition the first time.
From a procedural standpoint, you're wrong - legislatures repeal laws all the time.
From a procedural standpoint, the step has already been taken ... 8 states have already legalized recreational marijuana.
I live in the mountains of southeast Kentucky and have watched the scourge of illegal drugs destroy families and lives. I have a couple of relatives who are what I call lost souls. Each day you hear they haven’t been found dead is by the grace of God with them. They both started with weed.
I hope the powers that be know what the long term consequences of this may be. I suspect they don’t and only see tax revenue streams from this and votes. Ironically I expect the use of pot will eventually get a negative view in society down the road, not because it is a drug but because of the damage the health care system is going to start finding with the destroyed lungs of pot smokers. They will be the new tobacco smokers in our society eventually.
How so? We criminalized marijuana before.
Right or wrong, we can do it again.