It is NOT "that simple."
Timing carbohydrates early in the day will prevent a person from gorging on them late at night - especially a fat person, who already probably has a habit of eating starches & sugars late at night (which is likely the reason they have stored tons of fat).
If you aren't storing fat overnight, you are going to be much more able to lose fat overall.
I've been a fatty most of the last decade, but have lost 40 lbs with modest strength (i.e. lean mass) loss, in about 6 months. Key is, I now eat a diet I can sustain the rest of my life, without starving myself of carbs (and having the massive carb cravings you get when you come off a low carb diet, which is not practical for athletics in the first place).
The problem of weight loss isn't as simple as just counting calories (or "self-discipline"), and it never will be, especially not for people who are more than 30 lbs overweight. Weight loss is a problem of proper nutrition and eating habits, not really "calorie counting," because proper nutrition and eating habits will take care of the calorie issue on their own.
It's easy to confuse bad eating habits, which are a kind of self-perpetuating cycle because they throw the body (and mind) out of whack, with a lack of self-discipline.
Weight loss may ultimately come down to calories in/out, but being able to keep or sustain a diet and a caloric intake level doesn't. And it never will.