If you're content with things, that's cool. But me, I'm not a prisoner to my vices. I drink, yes. I smoke pot, yes. Those things don't define me, but I do them because for me, they're amazing tools for self-medication. The only thing I would toss are cigarettes, but I'm not going to because slow suicide is the way to go.
I smoke
a lot of pot, but I don't let it control me. I'm not a washed up sleazy guy, I do an hour of cardio at least a day and lift weights and have a proper diet etc. etc. I'm a little lazy when it comes to academics but I know my s**t, and if I don't, I ask. I'm a nature freak myself, I love hiking and taking photographs of landscapes and whatnot, which is a paradox in your logic because I'm probably one of the biggest closet potheads ever. It puts me in a state of mind where I can truly take a look at things and see them for what they are.
The way you label the people who do the things you condemn is biased and closed minded, and to me caffeine is the worst drug out there because it's the easiest socially acceptable stimulant to access. I don't know where you're pulling all of this warrior-fighting-not-a-doormat stuff from but having tunnel vision when it comes to anything is ridiculous, especially when your experiences with what you're labeling are merely a corner of the whole picture.
I'm not saying you're wrong in doing what you do, coz if you're happy that's cool, I'm just telling you that it isn't the substances. They can lead to destructive behaviour, but again, only if that person is weak or already a f**k up.