I'm sorry, but I can't understand why you don't see the utility in listening to what a highly successful person has to say about their personal work ethic.

Reread the quote again. He wasn't giving advice. He was explaining his own mentality. You jumped the gun and started criticizing him as if he is proselytizing on the streets.

If there are any criticisms to be had about what Kobe said, they could be made in good faith without an unnecessary mention of his career as a limiting factor of his experience.