Your health is your own responsibility

I question the worth of yet another little rant on the internet saying that we need more personal responsibility around obesity and health. Exactly what audience does the writer think they are reaching that has not yet heard this message? Or if they don't think it's a new message, how do they think their personal delivery of it is better or more likely to be absorbed than the million other times it's been given? Or, as I suspect, is the value of this message primarily for the one delivering it - displaying their own personal responsibility, and their ability to see through the 'excuses' offered by others?