Unless I misunderstood you, this is an unnecessarily dismissive reply and tone to a post I’m fairly sure you haven’t read yet because you seem to have missed its point. Feel free to read it.

People who have a slow metabolism (often) end up being fat, it’s just a fact. You a_r_e fat, you have a slow metabolism. You are under-productive, you have internal resistance.

The main problem of people who have “internal resistance” isn’t a lack of effort they put into pushing through the problem (I.e. it’s not laziness/indiscipline), they push a lot, and still fail, it’s the internal psychological and emotional barrier they have as an extra obstacle they need to get over and/or resolve, and that can’t be solved by just pushing harder.

If you wanted to draw a parallel it would’ve been: “You’re not glutenous and over indulging in food (you eat a normal amount of food, even small), you have a slow metabolism”. And just like people here shouldn’t try to eat even less food (there would be no result and would be even unhealthy, it would cause a lack of vitamins/minerals/proteins), the solution would be to address the actual underlying problem, the slow metabolism (and try to accelerate it, by exercising). The solution is exercise.

Or in the case of a lack of work results, it’s not “push harder, you’re lazy” it’s “solve your emotional, usually fear-related, barrier”. Maybe you have never had this problem, so you couldn’t relate, but feel free to broaden your views by reading the article (if you want). Telling people in this situation they’re lazy (they say it to themselves too) has no results. In fact, it’s counter productive, they’ll just push even harder, with no results, which is demoralising. The article is not about absolving them of solving their problem, it’s about helping them do it, by helping them identify the emotional problem and unreasonable barrier they have.