The idea that white men have the highest suicide rate is misleading - they have the highest rate of success, which is very likely because they are the most likely to own guns, which are far and away the most effective and effortless way to commit suicide. Effortlessness is important, because depression makes planning so difficult. FWIW I'd really appreciate it if we could not turn this into a debate about gun control.
The insight, of course, is that Elliot Smith didn't have a drug problem, he was looking for a drug solution. This is an incredibly accurate description of addiction. The saying in AA is "If alcohol didn't do anything for me, I'd never have let it do anything to me". Drugs and alcohol are a solution to the underlying problem, one in which we simply can't feel ok the way others can. Of course, they are a solution with horrible side effects, and one that eventually stops working. Many members of AA describe getting sober because the drugs and alcohol weren't working anymore, only to become suicidal and realize that the drugs and alcohol were only symptoms of a much deeper problem.