Why does this simple fact confuse you so much?
“Here is an easy experiment for you. Live for two weeks on Karo Syrup and a OneaDay vitamin. Forty TBSP (2.5 cups) will give you 2400 calories. By your theory, you should gain weight.”
Try it, get back to me. Or don’t. But until then, Later!
Eating calories does not equal absorbing them.