It's typical how most people really want to immediately buy into the simple fixes and religiously believe them without knowing why it worked. Overweight? Must be the fructose (recently) / carbs (a while back) / fats (further back). Same old story. Somebody makes rounds in media and makes a lot of money after publishing a book with something "new" - a simple fix. Fortunately we have people like Lyle McDonald, Alan Ara…
Very few public, true fitness instructors and dietitians are following the simplest rule ever - decrease calories to lose weight. This method is not that popular, its to tricky since it requires for person to calculate foods, which makes it unpopular for lazy. But it is absolutely the best method to lose weight fast, decrease calorie intake and create shortage.
You can't outrun your fork. Even if you want to create a caloric deficit through increased activity level, you'll need to hold intake constant, therefore you most likely have to track it to begin with. These days with things like MyFitnessPal there is no excuse. And while it's possible to lose weight without tracking (I've done it), it's not nearly as straightforward.
If people are truly lazy, they'd put down the fork, as that's all that's needed, no time "wasted" at the gym necessary. But hunger is a hard thing to beat, and willpower can be used up, not to mention a lot of other factors (mindless eating, eating for comfort or to self-medicate, etc).