Authoritarian bullshit. I have lots of activites that I've gotten good at, and I wasn't forced to do those. When something was my own idea I was really passionate about it and would happily practice for hours, but the minute someone else put pressure on me to do something it became an 'invasion' and I refused to do it anymore. And 'sleeping till noon' actually has a function. At that age you're still growing, and your neural circuits are still rewiring. You need that sleep. Seeing it as self indulgent laziness is just self righteous crap.