Lot of really bizarre, conspiratorial and paranoid stuff in here. Some of it has some truth. Some makes no sense. People frequently discuss the U.S. in this respect, but the reality is that virtually every nation, regardless of ideology, history, or form of government, puts significant constraints on drug use at one level or another.
I don't support the "War on Drugs" in what it has become. I support legalization of pot. And I firmly believe we'd be a better off society if the roles were reversed and pot were legal while alcohol was not. That said, there _are_ many "good" reasons from the standpoint of the government and society for many drugs and drug consumption to be highly regulated or illegal. I'm sorry you "don't believe" it, but you might start with a study into the concept of the social contract and other society-benefitting arrangements of order and - yes - authority. These are necessary, organic constructs. They can certainly be twisted and abused by authority, and not infrequently are, to their own purposes. But at base, they stand on their own, and are from where these types of constraints on behavior spring.