Yeah right, counting calories works for "99.7% of the population" but then everyone struggles with weight loss, somehow.

Cutting out that candy bar may work on paper, but the body will adapt to that reduced intake.

I'll cite the article I linked:

"One show contestant lost 239 pounds and achieved a weight of 191 pounds, yet six years later, after regaining 100 pounds of that lost weight, had to consume an 800-calorie-per-day diet to maintain his weight."

Now, you may argue that this person is an extreme outlier, and that's certainly true. However, it illustrates the principle. Differences as small as 10% can make a big impact over time.