I understand the distinction between simple and easy. Digging a pool in your back yard is simple. It's not easy. (The author is incorrect about running marathons. Running a marathon is complex.)

> I think fundamentally the problem of loosing weight is not particularly complex.

My point is that any definition of "fundamental" in this sentence that discards the essential humanity and cultural context of the person losing weight ends up with a "problem" that is in no meaningful, actionable way based in reality.

The fact that it is a real living breathing human who has a life and a day job who is trying to lose weight is essential complexity.

Arguing otherwise is akin to saying that putting an astronaut on the moon is simple: just fire a ballistic missile at it. Oh, what, the astronaut needs oxygen, hydration, and can only handle a certain amount of acceleration before turning into a reddish paste? Well, that's just "artificial" complexity and it's their fault for having a body that is so poorly engineered.