Being alcoholic is usually not a natural disaster (as far as I know), so this does not say anything about the cause.
You had said that maybe he was homeless because he kept giving everything away. I pointed out that he was homeless because he was alcoholic. Not a natural disaster. I regard it as a mental illness in the addiction category. I was an alcoholic from my mid-teens to my mid-20's, so I know how hard it can be to quit. And even harder without supportive non-drinking friends and family.