I don’t see how this can be true in the limit. If you are a women and burn > 2000 calories exercising then surely your total will be higher than the sedentary total of 1900 calories :).
The human body doesn’t indiscriminately burn its weight in calories as fuel. Energy intake and expenditure is complicated. If someone expends energy through using up their stored glycogen, as most of us do, that may not use energy from fat mass.