It is true that many drug users never actually get their lives ruined over it.

But drugs are still negatively impacting their health, and there is always a risk of addiction forming and getting out of control.

I live in a country where drugs are illegal, but alcohol is "alright". Should I say people fuck up their health big time, and many, especially among men, do face issues with alcohol addiction? And those that go for drugs anyway rarely actually recover?

My take: people don't need drugs. People need an improvement in material and mental wellbeing, and drugs (and alcohol) are there as a form of escaping a poor reality. Drugs are just the way to make the world more bearable and "fun", to try to squeeze happiness from a grim reality, without thinking much of what it costs in the long run.