Not really plenty of people take up drugs for fun rather than as a coping mechanism. A lot is just because of curiosity too. The motives are diverse.
Solution? Don’t rally for drugs, rally for improving life conditions so that people wouldn’t try to escape reality.
That doesn’t remove the other, more sensible reasons people do drugs. See above statement.
It’s not always possible to improve the quality of life. We should definitely try though, don’t get me wrong. There will always be heartache, sorrow, mental health issues and disabilities though. That’s just the human condition. Sometimes drugs are actually the less self destructive coping mechanism, especially with psychedelics. In some cases something that’s recreational for one person, is a medicine for a second person, and an addiction for a third. See amphetamine/adderall for an example.