@TGBM yes genetics do play a role
but you can't trace back everything to genetics, that not very scientific
you know the polgar sisters?
their success is due to their father wanting to test his hypothesis, that not everything is due to genetics
you see how it planed out
all three of the sisters admited that susan polgar became the best of them because she put in the most work out of the three
his conclusion is something to the lines of "give me a healthy child and i will make him a master at anything"
but basically i agree
everyone has a natural limit on what they are capable of doing and what not
but with age the bar gets lower and lower
learning especially at a young age keeps the bar it it's maximum
and therefor, evaluating chess positions, which in the most cases isn't the single most hard thing in the world, is something most people can learn