Well, one can bias one's body to use fat primarily. Takes a few weeks of training. Great for endurance sports.
Dubious relevance to the topic notwithstanding, the first part of your statement is trivial; the second part, false.
The trivial part is that the body will burn whatever macronutrients you feed it, in the proportions you feed it. If your diet is 20% protein, 20% carbohydrate, and 60% fat, you'll burn 20% protein, 20% carbohydrate, and 60% fat. If your diet is 20% protein, 60% carbohydrate, and 20% fat, you'll burn 20% protein, 60% carbohydrate, and 20% fat. This follows from the first law of thermodynamics and the fact that your body has only one long-term reservoir of energy storage: adipose tissue.
The false part is that a high-fat diet is good for endurance athletes. It isn't. Jogging isn't an endurance sport. I'm not an expert in exercise physiology, but, as I understand it, endurance sports rely highly on anaerobic metabolism, and hence need glycogen. And a high-carbohydrate diet maximizes glycogen storage.