Are you a bomb calorimeter? A calorie is a unit of heat energy, how are you eating it? From the article itself:

“For decades we’ve been telling Americans that you’re lazy, it’s your fault, you’re not moving enough, you’re eating too much,” Mozaffarian says. “And I think what this study shows is that there’s really complicated biology happening and that our food is driving this.”

It’s not simple, nor is it straightforward. Our bodies are complex.