People who think that fat-loss is only about CICO are wrong. Cutting calories isn't sustainable, you can't keep cutting calories forever. You can't live in caloric deficit forever especially if you're training and are physically active. Eventually your body will adapt to living on less calories and stop responding, then what ??...The problem with using exercise ( especially cycling, running and other aerobic exercises) is that human body adapts to it very quickly. When your body adapts to exercise it will stop responding, you become more efficient and burn less energy, then what are you going to do ??. Are you going to cut more calories and starve yourself even more ??....It's really strange, we have more information on nutrition than ever before, we have all kinds of nutrition apps, all kinds of good wholesome food, and yet obesity epidemic is getting worse and it's not just among sedentary people but a lot of fitness buffs are overweight too.