If you are 15% bodyfat and have 0 muscle mass... you will cut and be a skeleton. If you have 15% bodyfat and have proper diet and training you will put on almost fully muscle AS A BEGINNER, this will lower your body fat percentage because you will have more lean mass, not less actual fat. After you put on some muscle and exhaust newb gains. Then focus on cutting. I have seen many many people who are new to the gym make this mistake and try to cut down to abs... when they have nothing to cut down too. If you look at many great powerlifters, strength and conditioning coaches, they will say the same thing. This is what we would have athletes do in the d1 strength and conditioning facility I interned in. Cutting first, when you have no muscle mass and are a beginner, is going to be a waste if you're skinnyfat (not fat). Those are great general rules you posted above for someone with experience but for a basic beginner the stimulus from adding in proper weight training and a solid diet will provide significantly more benefits than wasting your time cutting first. You can be 15% bodyfat and be very very skinny. This is not for your average "dad bod" type body which has some muscle mass hidden under a lot of fat. You can reduce bodyfat by putting on muscle mass and that is made easier by being a beginner with no mass on you at all. These people don't have horrible insulin sensitivity and other issues that fat people have. I am not disagreeing with you that if you are fat you should definitely cut first but the statement made is too general and there is far more nuance to the situation. The articles your quotes are not taking that into account and are addressed to your average fat poison who has been working out with subpar results. You won't pile on fat as a beginner with a good diet program and a good strength training program. It is very very easy to do this and I have had numerous people follow this advice with great results. You have to look at each person as an individual, a cookie cutter approach to dieting "rules" will never work-- our understanding of nutritional science if far too incomplete.