My guy, you seem to fail to understand how a functioning society works at its most basic level. There are these things, called laws. They exist because usually those with wisdom and experience from running previous generations of surviving families, towns, cities, and nations understood a basic set of rules leads to a survivable and desirable outcome. People who wish to live in lawless areas of our earth tend not to survive. You can move to the middle of the jungle and nobody is gonna enforce any laws. You’re also not going to benefit from a group of cooperating humans working to keep you alive. So take your pick.
Your position tends to be there should be no laws, specifically around drugs, because you perceive that as one individual telling another what they can and cannot do. In your concocted scenario, it’s me specifically telling the entire world what they can or cannot do. What you’re failing to comprehend is laws are a shared set of customs among a group of people. They ensure this group is one you want to live in. Different groups have different laws.
I already answered your question. The laws I adhere to in this specific case are clearly for the better and I support them. If there were no laws, I would lobby those I live around to agree to establish some for the benefit of my neighbors and their families. In that fictitious scenario, it’s me and the other people I live and work with coming to some sort of agreement on what the laws are. This is known as “politics.”
If you cannot comprehend the concept of laws, I do not know what to tell you.