You know, the first law of thermodynamics was discovered before special relativity.

Fortunately scientific principles don't rely on human awareness to function!

Or, more fancily, “If you e.g. eat epsilon more calories per day from fat and epsilon fewer calories per day from carbs, or epsilon fewer calories for breakfast and epsilon more calories for dinner, all other things being equal, the change in your medium-term weight-loss rate divided by epsilon will be quite small.”

I wouldn't disagree with this significantly, but with the same caveat that you mention yourself.