"If you vigorously lifted weights for an hour, you’d only burn ~400 calories, less than a single cheeseburger! You’d have to keep that up every single day without increasing your diet to lose a less than a pound per week. I decided it’s easier to simply eat less."
What he is missing here is that lifting weights is anabolic and re-building damaged muscles from weight lifting takes lots of calories. Therefore, your metabolic rate increases and your fat burning increases 24/7 when you are progressively challenging your muscles by lifting increasing amounts of weight. Therefore, burning 400kcal in one hour lifting weights isn't the extent of the effect of that workout! This guy doesn't seem to know very much about physiology or metabolism...