https://en.m.wikipedia.org/wiki/Matt_Martin_(racing_driver)
During a March 8, 2008 airing of Speed Channel's Trackside, Mark announced that Matt ended his racing career. Mark stated his son wanted to concentrate on his education but didn't rule out a possible return to racing;[5] later that year Matt Martin stated that racing was "not my thing [anymore]".
^the above quote snip from the posted link.
I congratulate Matt for being true to his heart and self. It has to be a tough lot to try to be what others expect you to be. Rejecting that lot is not necessarily a failure, in fact I think it is most likely a postiive.
Racing ain't easy. It is an insanely crazy strung out passionate world. Those that are not totally consumed with the desire will suffer the consequences of being in a place they shouldn't be. It would also unfair to the a large group of people dedicated to one's sucess. It is his buisness but I hope he found whatever it is that he wants to do, and that he is successful.
Sometimes people only see sucess in the most obvious or tangible way, like this kid just had to be a great driver one day, and at least try. Or that somewere along the way something failed with a kid like him. I think that kind of thinking is a disservice to a youngster, we are all individuals and wired a little differently.