I don't believe it's related to being-busy. It's more about discipline in their life. Elite player's life is more organized, hence they seem less busy.
e.g I work out every day from 7 to 8 pm. I may be sounding less busy. But if the routine is the same, but I decide to go to the gym at random schedule, I will be more unorganized, will look busier, might be less productive, and yes I'm doing something wrong.
e.g I work out every day from 7 to 8 pm. I may be sounding less busy. But if the routine is the same, but I decide to go to the gym at random schedule, I will be more unorganized, will look busier, might be less productive, and yes I'm doing something wrong.