You are correct kwhs. It is of course his business and I suppose if too many people tried to talk to him about it, it could be counter-productive. His take is that he wants to concentrate year round on baseball and apparently there are enough opportunities out there for him to do it.
My take, and keep in mind I am just a spectator who never played ANY sports, is that if you are a gifted athlete who can play almost any sport (and by the way he had an incredible eighth-grade year on the football field but never came back) then you should enjoy your talents and make the most of them, and let the skills that you develop in each one of those sports help you become a better overall athlete. But I guess he doesn't see it that way.
The thing that amazes me the most about him is that if you were to watch him in action on the basketball court, and keep in mind that is where you get the closest look at anyone's raw talent, you would think that basketball was his main passion. I say that because he was an intense competitor and was fundamentally one of the soundest players I have ever seen. You know one of those that does a lot of things that don't show up in the stats.