I don't understand what this incoherent rant was about.
Junk science was used to demonize drugs and scare the public into accepting prohibition. Junk science is being used to demonize genetic engineering.
You are right, you do have the right to sell, purchase or consume drugs. Weed and other drugs should be legalized, and there shouldn't be a law requiring the specific strain of weed to be labeled. If you choose to buy unlabeled weed that is your right. Same thing with food.
This issue is pretty cut and dry. I don't get the outrage and demands for government intervention.