The difference between such men as those you have described and such men as you is that they were made to be thin men and to keep on being thin men regardless of their food consumption, and that your sort are naturally predisposed to fatness.

You can't judge their cases by yours any more than you can judge the blood-sweating behemoth of Holy Writ by the plans and specifications of the humble earwig.
"One man's meat is another man's poison; that's a true saying.

And here's another saying--one cannot eat his cake and have it, too.

But that's an error so far as you are concerned.

The trouble with you is that when you eat your cake you still have it--in layers of fat.