From the moment of birth you're dependent on a substance called breast milk. You're hungry, and so you drink. It's natural, and gives you what you need. You may overdo it sometimes, selfishly taking more than your fair share, wanting more and appreciating less than you should. This causes you to explosively shit your pants and vomit on yourself. Hopefully, through trial and error, you find that balance and form a healthy relationship with your mama's beautiful titty, and what a beautiful relationship it is. Then one day, the mutual benefits of the relationship cease, and it's time for both parties to move on. This pattern displays itself innumerable times throughout life, and it's up to each of us to figure out how to give & receive, and how to progress. I think you can apply this to many things.
If "you are god and god is everything", then there's no reason to call one substance a drug, one a medicine, and one a food. It's all god, right? I think we have to realize that we're being influenced by so many things every day: the people we meet, the things we read or see in the media, the amount of sleep we get, the current climate, the history behind us, the future ahead of us, the things we desire, the experiences available, the beliefs of the society we grew up in, the light of the sun, etc. etc., and yes, the substances we consume. Any of those things can be abused; any of those things can be a drug that brings you down. Or, they can all be healthy and beneficial. It's all about the relationship you create with them. You'll always get out a transformed equivalent of what you put in. Keep showing the universe love, appreciation, and growth, and it'll keep feeding you that sweet life-milk that keeps you running.
"You have all of the answers inside of you. Everything you need is already there." If your parents or anybody else really believes that's true, then have them test it out. Have them start fasting, for there's no reason for hunger. Everything they need is inside them already. They don't need the paper that their chakra and meditation information was printed on, or the clothes that keep them warm, or the plethora of other "substances" that they rely on for various other purposes. They may be sober of psychoactive drugs that can alter your state of being very rapidly, but that doesn't mean they're free of several other powerful influences that work slowly and subtly.
The Buddha may have said desire is the cause of all suffering, but I think it's also the cause of all happiness. There's a purpose behind who I am, where I am, and where I want to go, and I plan on finding those things out while enjoying my way there. It's up to each of us to decide what will help us progress on that path, and discard those things that are holding us back. It could be a person, or a drug, or a habit, or.....
When my stomach grumbles, I eat. When I'm tired, I sleep. When I'm lonely, I find friends. And when I'm ready and hungry for a wild journey into the unknown, I use psychedelics.
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And when done with the right amount of preparation, imagination, love, and respect, it's the most natural thing in the world. That's my take.
"I have great faith in fools; self-confidence my friends call it."