This is precisely how I feel about most self-help and productivity advice, except substituting "mind" for "bodies", and "procrastinator" for "fat person". ;-)

The fact that it feels precisely identical should not be surprising at all - precisely the same mechanism is occurring in both cases.

Mental health/productivity and physical health/fitness are both situations that have a massive social stigma, and a massive incentive for people who are (to use Msr. Yudkowski's term) "privileged" to function in a manner that allows them to achieve socially acceptable results by performing socially acceptable procedures.

The fact is, our culture (and regrettably, ESPECIALLY the sort of people who are attracted to lesswrong) thrives on the sort of "but I'm better than that!" thinking that leads directly to prejudiced bullshit about "willpower" and "not trying hard enough" and "wanting to fail" and "ugly fat fucks" and "useless social retards" and "parasite welfare queens". Because, as a species of social primate thrust into a constant high-stress environment, those of you who are constantly receiving cortisol/dopamine signals that you're just-barely-making-it-but-look-out-for-that-tiger need people to feel superior to.