Yeah you're right in a sense. Of course there are natural inclinations - I probably should have clarified it but I was writing fast without proofing.
I guess what I meant in that bit was kids that say 'Im so bad at maths' or 'I can't spell'. In terms of neuroplasticity, what we practice we get better at and we enjoy it because we are good at it and it makes us feel good. We avoid what makes us feel bad or that we don't have success at and then we just can't do it. Doesn't mean never will be good at it, just that practice is needed.
Sometimes that's determined by what we are born with - our very bone structure can lend well to certain activities eg dancers hips vs runner hips.
But a huge part, alot of what we become is socialised and cultured - reinforced, I suppose.