747FOCAL;
It's a learned skill and anybody can learn if they want.
My guess is that you've never tried to teach someone to fly a modern jet.
Yes its a learned skill, and yes you can probably train anyone to fly...if you have enough time and money (and patience).
In my training experience you find the vast majority of individuals can hack it within the allotted time span of a conversion course.
Some of them...the 'naturals'....seem to be gifted with 'an inate skill' that allows them to do it in half that time or even less (thery make me sick).
But its equally true that you occasionally find the odd sad individual who just cannot do it. No matter how hard you try, no matter how long they spend in the box...they'll just never get it.
And remember, these are usually people who've been carefully selected to have what are perceived to be 'the right skills'.
That says a lot to me about how the other 99.9% of the general populace might perform if given a try out.