Suppose YOU tell us why you think its OK for children to have unlimited access to free pot.
Speaking of straw men, nobody said anything about "free pot."
Speaking of children, they report that they can get pot (which is illegal for all, except in a few states) more easily than beer or cigarettes (which are legal for adults). It appears that the most effective way to reduce access to marijuana by young people is harnessing the power of the market by legalizing for adults, so sellers have the potential loss of their legal adult market to discourage them from selling to minors.
How many street corner dealers are checking ID's? The legal shops here in CO are doing a MUCH better job of keeping pot out of kids' hands than any prohibitive measure does.