> The fact is, the point is, CICO ignores all the real challenges and thereby all the real problems people need to understand and face.
I think we'll have to disagree here. At the end of the day CICO is the formula. That obviously doesn't account for the human factor in regards to the adherenace rate, but it does, fully encompass the 'if you were a robot and were fully adherent how do you lose/gain weight' method.
> To even determine CICO is fraught with difficulty and inaccuracy in both CI and CO. You can hand make everything, weigh every ingredient, and even then you struggle to determine how much you're CO. At best you'll have an estimated CO but then what do you do when your weight isn't changing? you have to start adjusting the math because clearly you're not burning as much as you think you are.
I won't say it's 'easy', but it's also not particularly hard either with the multitude of widely available food databases for measuring calories in. As for calories out, it's arguably even simpler: measure your weight every day, take the average across the week, and watch your weight trend week over week. Calories out can be calculated simply by comparing calories in vs. weight lost/gained... and extrapolating. It's simple math, and very effective in my experience.
> This is made much, much worse with the fact that we don't actually burn that many calories with exercise. And even with what is burned, the rate of burn changes drastically based on your current weight and how long you've been losing weight.
Essentially irrelevant if you follow my above suggestion for how to measure calories out. It's just part of the bucket of calories burned, so as long as you're reasonably consistent with the amount of exercise you do then your averaged weight will account for any exercise based caloric expenditure.