I still think it's best to look at it scientifically. If your car is broken, you want to go under the hood and look at what's going on. Isolate the cause, and fix it. It may be one thing to go "okay, let's have common sense, get oil changes every 2000 miles, etc" but if you have a problem then you want to take control.
Your body is burning calories as fuel. Excess calories are stored as fat. If someone needs to lose weight then it's extremely helpful to take control over what's coming in and going out. Just intuiting what to eat and when works perfectly fine for some people, but those who have a weight problem -- Clearly it's not working for them.
My 2 cents please don't make me eat my arm. My arm has too many calories