I agree. Also age and other activities factor in I'm sure. I suspect you carry your bouldering mat and do some walking to and from boulders.

I think it stands to reason that if we took an overweight person and trained them to eat what you or I eat and then move like you or I move, they'd end up losing weight.

For me though, I know that I can be running say 50km/31 miles a week regularly and that if there is weight loss, it is impercetible to me. But up it with just two more runs and I believe I do start outrunning my diet. Again, this is an n=1 and ignores pretty much every other factor in my life.