Comment by necovek
In formal theory, it would be called a proof by contradiction when extended to an extreme.
Even with the "right mix", if you eat 5x the amount your lifestyle and body and mind need, you ain't ever going to lose weight or get to a healthy state. Obese people are (usually) obese because they eat too much, not just because of the type of food they eat. Heck, today both keto and vegan are considered "healthy" and they are on the opposite end of the spectrum when it comes to diet choices.
I am basically arguing that, to an extent, it's more important how much you eat, vs what you eat. Again, this is all comparative (eg. eating McDonalds burgers for the rest of your life is "healthy" compared to not eating anything at all, but that's a useless distinction).
Plenty of people in the past have eaten "unhealthy" (white bread, fried meat and vegetables) yet didn't have an obesity or health problem, because they countered that with a balanced activity (physical work) and mental load (shared responsibilities).
So my point is that you should reach that "autopilot" on the amount of the food you get, and then you can be pretty liberal in how you achieve it (obviously, don't have chocolate for breakfast, lunch and dinner). I do agree getting to the autopilot is where you should put your effort to.
If you need to eat more, you need to eat more. You need a different mix
There isn’t a diet that works for everyone in both health & physical & psychological diet needs
The point is always making progress. Accumulating foods that work better. So learn and continually try things.
Anyone can make progress, that is beneficial.
I am still making progress, in food quality & convenience, which blows my mind.
And I don’t doubt there are medical and mental issues that need more than a healthy diet intervention
But that doesn’t eliminate the benefits from being healthier, easier.
You don’t know how much eating healthier automatically will impact seemingly independent or counter issues until trying. A sustained changed diet changes our responses to food physically & mentally in significant & positive ways.
My diet has changed me.