/Facepalm
Let me get this straight, you readily admit that the number of calories to the pound can be different as much as 34% between two people, 1200 calories, but you want to act like it is equivalent to balancing a checkbook, which, by the way, in my experience a lot of people can't do? Never mind that their number changes depending on age, hormonal changes, activity level changes, sleep cycles, general health, and a host of other factors, the fact alone, that you freely acknowledge, that the number varies for everyone in exactly how many calories will make one pound and the obvious, humans don't come with an instruction manual that indicate how many calories will do it for them, and on its face the idea that this is a simple task is already farcically absurd.
But
it is equivalent to balancing a checkbook. Nobody is saying that everyone has
exactly the same level of metabolism. Some people have faster metabolism, some people have slower metabolism. Some variance is normal. Some people exercise more, some people exercise less. There are differences between individuals, but the fact that everyone is different does not negate the "calories in vs calories out" equation for any given individual. It just means that some individuals will have to work harder than others.
Same with the balancing checkbook. Some individuals earn more money, so they will have more money deposited into their checking accounts. And some individuals carry more debt that weighs them down, so they have more expenses than others. Income usually also changes with age, people hit their best years in their early 30s, but after they hit 50's age discrimination might diminish their income stream. All in all it will be harder for a lower income individual with higher debt level to balance their checkbook, most likely sacrifices will have to be made somewhere, whether it's getting a used car, or giving up starbucks and cable, or shopping at IKEA instead of designer furniture store, or even giving up their 4 bedroom house for a small apartment. Who knows? But the bottom like is most people can balance their checkbook if they really want to, it's just harder for some individuals than others.
Nobody is saying that two people eating the same amount of food and doing the same amount of exercise will look exactly the same. People with higher metabolism will have easier time looking good. Nobody disputes that. What people are saying, is that everyone can look good and be healthy if they balance their
individual "calories in vs calories out" equation. Just like with checkbook, some people will have to make more sacrifices, they will have to run more miles than others, or they will have to completely give up ice cream, but it is possible.
/double facepalm
Really, are you pretending that the body is a closed system wherein thermodynamics applies in a measurable and meaningful fashion in this discussion? Does nobody poop in your world? I think I finally have a good handle on how you got so full of shit...
Yes really. Food is calories in. Poop is essentially "calories out", or if you want to be precise it's a "calories out" byproduct. The food gets digested, converted into energy and whatever cannot be processed by the body gets expelled.