It comes down to personality and biochemistry, not everyone is that hooked on the stuff.
If you ban everything that is addictive you end up doing a disservice to people who can handle the substance or item in question. Banning addictive substances because some people can't handle them goes against my philosophy of the purpose of government.
Do we need some kind of super-citizen test where you have to prove your knowledge and responsibility for people to be able to be free to do/have/use the things they want?
I don't want a nanny state that bans what it thinks is bad for me and prevents me from accessing things that I want because some people can't handle it.
I was talking to some of my old farmer relatives a few months ago and one of them was telling stories about his dynamite license. It was a useful thing to have when interacting with the land and you could get a license and just go out and buy dynamite. This was maybe 50 years ago. That is the kind of world I want to live in, where people who can prove themselves can get any tool they want or need to manipulate their minds or the world around them.
Not a world where a committee (or public pressure) can decide what I can't handle or what's too dangerous.
I don't want to live in a world of padded walls.