The lament of the do-gooder, we suppose, is that human beings don't always play along. Or seldom do. While many things may be "good" for people - eating right, not smoking, exercising, etc. - most people do not consistently stay on track. The do-gooder might want to consider that human nature tends to be self-indulgent. Avoiding the hard stuff while still enjoying rewards is a lifestyle - chosen or hard-wired, take your pick.