On top of that, an athlete with an obese BMI is still putting extra pressure on their joints and has a higher risk of ending up with more physical ailments down the road as a result, so bringing it up as an argument for the BMI scale being wrong is still dumb. Athletes with a lot of muscle just won't have to deal with shit like fatty liver disease, heart attacks etc (for the most part, at least), plus they can return to a more normal amount of muscle later in life and offset some of the damage done by lightening the load. Fats don't have the willpower for that, they are fat and stay fat until their bodies eventually crumble or combust.