Oh well fine, maybe it wasn't him. But your statement is flawed.
Drugs may very well be "wasting" money and time in your eyes, but then, it might be a valuable and enlightening experience to someone else. I can't properly explain tol you how it feels to sit around in a circle with 4 other musicians, all tripping on acid, spontaneously creating music. It's beyond hippie jam rock. It's beyond avante-garde jazz. It's probably my favorite thing that I've encountered in existence thus far.
As far as the "cause you serious problems" part - that's ridiculous. How can a chemical that you choose to take or choose not to take cause you serious problems? The person is always the problem, not the drug, unless they took it against their will, in which case, it's still not the drug's fault.
When I say "you guys are missing out," I'm not seriously saying everyone should take them, I'm just enthusiastically proclaiming my adoration for them.