The last part of that comment has already been proved, because we have been actively pursuing our present policy since the early 1970s, and throughout that entire time, the situation has demonstrably only gotten worse.
If we were to allow these drugs to be manufactured by reputable pharmaceutical or tobacco companies on low bid contract with the government, and then sold to adults at government package stores in brown packaging without any trade names or any advertising whatsoever, and at prices that are about half of what they are being sold for today out on the streets, the drugs would be less available to children.
Ask our young people yourselves, and they will tell you what they tell me, that it is easier for them today to get marijuana, or any other drug, if they want to, than it is alcohol. Why? Because today’s illegal drug dealers don’t ask for ID!