This worked beautifully for me when I was in my 20s. Now that I’m in the second half of my 40s it doesn’t work well at all. My body requires a starvation diet before I see even a little weight loss, and I can’t keep it up while remaining productive in my job.

This is one of the useful lessons of age: you essentially get to experience living in more than one body within your lifetime. Younger-me would have posted the same confident advice as you did, and it would have seemed just as intuitively obvious - how could it be wrong when I experienced it myself! But in practice for someone with a different metabolism (at any age) it’s deeply unhelpful, even demoralizing.