Another analogy I can think of is complaining about someone who is giving general fitness and diet advice to fat people because "They will never become a professional athlete with that advice!"
If you are a fatass who just needs to learn how to eat less and exercise, the least of your worries is being one of the greatest athletes in the world.
"Look how much Michael Phelps eats in a day! Clearly eating a lot is not always bad!"
Again, you are talking to fatasses, not people on Phelp's level.