When I was 10 arrangers had not been invented, and I never played piano so didnt have any chops, except my baseball swing.
The kid is obviously gifted to say the least.
We are mostly a forum of old men who play arrangers for our own enjoyment and for friends and family.
Maybe as this lad grows he will learn some popular music too, to supplement his mastery of this genre. . Jazz must be pretty easy for someone to conquer it at such an early age!
Oh lighten up, I'm just agitating again!