I think he is right. There is something in our mind/thinking that cannot be photographed. Even to explain (or teach) it is difficult (but still possible).
chess ability at birth

I think your friend is wrong. Human beings have the potential to learn absolutely anything from a young age. As people grow and develop, they learn how to do only a paltry few of these things. Along the way, they may pick up certain quirks that 1) subtly improve their execution (whether significantly or insignificantly), 2) subtly hinder their execution (however significantly), or 3) have no impact on their execution.
someone a rather good player in the club said that some of positional understandings in chess couldn't be learned he said some of the chess abilities we have is something in our genes.
do he has point? he came up with an example: a tennisplayer has a way of swinging his racket that nobody can learn, each tennisplayer way of swinging his racket is different.
I think he is wrong since you cannot compare a human ability to chess positional understanding.
I thought about and I really don't think he got a point. everybody can learn rocket science it just takes more time with some people. - it is the same with chess.