I get what you're saying. It was his theory though, that he could have taught them to be successful at anything he trained them in. He originally was going to try to prove his theory with mathematics, but Susan discovered a chess board. He believed he successfully proved his theory. Kind of hard to prove it either way. All three girls were successful and Judit had a peak rating around 2735. The original post was interesting, but it's an interesting argument.
Chess greatness CANNOT be taught or learned……
"Instaneously" contains all the vowels, according to the OP. So does "abstemious", but in the right order.
Wouldn't it be interesting if an idiot savant became World Chess Champion? Who's to say it couldn't happen?

paul porhy was one of the most talented players ever. if he would live and play today whitout any kind of new trainingnof these days his rating would be around 2600. is he not tallented? and what about fischer he study chess 24/7 and became the best player ever? would he be so good whitout studing chess?

Nature versus nurture argument. This one came off of Noah's Ark with crutches ;-) (As does that old joke!)

Researchers Boost Memory Using Magnetic Stimulation
http://www.iflscience.com/brain/researchers-boost-memory-using-magnetic-stimulation#kyKfVwt1CbjZMd6c.99

I read this premise earlier, it contains a very interesting viewpoint. One thing sticks out in my mind, it has for the better part of my life.. That is the "anomaly", I've seen anomalies in sporting events, and various mental and physical competitions. It's the strangest thing when this occurs, spectators wonder, "Did that just really happen?" It wasn't supposed to! Yet, there it is. Doesn't matter what, Roger Bannisters sub 4 minute mile, Bob Beamon's long jump in the '68 Olympics, Buster Douglas's win over Mike Tyson in boxing. The minute you believe you've got it figured, along comes the anomaly, who hasn't read the memo about "can't" and just DOES the seemingly impossible. I'm not splitting hairs with anybody's research and fact checking. I am simply saying not believing "cannot" is a important part of that success.
As far as NBA players never being stars if they are five feet five inches tall, I think Spud Webb and Mugsy Bogues would disagree with you. Spud Webb won the slam dunk contest a few years back. As far as chess and being born with it-I think the Polgar family is an argument for being taught to be great at something, and not just being born with it.