It also depends what drugs we're talking about.
There are definitely drugs much more likely to cause problems, even if you didn't have any in the first place. And not everybody who runs into problems with drugs used them to cope with problems they had. Careless recreational use can lead to addiction all the same. Especially when the drug can create a physical dependecy, like alcohol or heroin do.
But it's also a lot easier to blame drugs than to pin down societal problems that might lead people to problematic drug use.