It still is, same for adding weight too. What happens is people take drastic measures, cut food intake, and add crazy amounts of cardio. Problem is that is hard to maintain so while they lose weight (muscle,fat,water) they slow their metabolism down. Once they get to the weight they want they go back to eating like they were before and now with a wrecked metabolism and gain all the weight back plus more. Slow and steady wins and its easier to manage food intake if you look at it for the long haul. To do all that cardio you have to have fuel, I know it sounds crazy but sometimes to lose weight you have to eat more.