That's exactly what it is. A lot of cats were just super tall from the jump, or super athletic, and were sort of pushed into sports, it's not everyone's passion. Fans always seem to not be able to understand that. That's why you always get the "Why are they complaining about money, hell, I'd play for free" bullshyt.
Not only that, it's easy to love playing basketball when you're just doing that shyt for fun after work or on the weekends or whatever. I'm sure when it's your job and you have crazy (bullshyt) pressure put on you and it's really the only thing you've done all of your life, it probably takes the joy out for a lot of guys.