Drugs are already readily available regardless of the law.
That's the point.
The drug lords are drug lords because drugs are illegal. Take the money out of drugs and you would wipe out a huge segment of organized (and otherwise) crime.
Al Capone (And Joe Kennedy) became very wealthy - and produced major crime of all sorts because of prohibition. It was a failure. It was a failure for all the same reasons as the WOD.
There are plenty of conservatives that see the collateral damage caused by the WOD as being far worse than the original problem being addressed.
A better solution is to teach our children not to use drugs and the reasons why. It starts at home. The government makes a lousy mom and/or dad.
Availibility and use are two different things.
Every single survey has shown that teens say marijuana is easier to get than alcohol -- yet teens use alcohol 2:1 over marijuana. Legalization (even restricted to adults) carries a societal acceptance.