Pointless is quite wrong though. Drugs can be dangerous and because of it should require a lot of thought, education about, and respect if you partake on it but they are definitely not pointless.
If used in ways that doesn't affect someone negatively (and here is where the danger, education, and respect part comes in) it can provide life experiences that you could never, ever have by being sober.
Doesn't mean that a sober experience is subpar, it's just different, and it's ok if you want to live that way but it's not the only and "right" way to live a life.
There isn't much to be educated about. Scientific research about the long-term effects of any of these is inconclusive, even on alcohol and tobacco which is everywhere. All they know is smoking increases the risk of lung cancer.
If used in ways that doesn't affect someone negatively (and here is where the danger, education, and respect part comes in) it can provide life experiences that you could never, ever have by being sober.
Doesn't mean that a sober experience is subpar, it's just different, and it's ok if you want to live that way but it's not the only and "right" way to live a life.