To support what you said, there has been exactly one time in my life where I was exercising enough that it affected my weight, and that was when I was playing water polo for 3 hours a day, every day. That is a level of exercise that just about no one will put themselves through, where even your down time is spent treading water. And all that working out? Equivalent to pretty much one meal you'll get at a restaurant. And makes you ravenous, so the real reason it worked was that it capped out my availability of food, not my appetite for it.
