don't get me wrong, children have a greater potential, to become more imaginative. we are all have a larger right brain dominance when we are younger and most people end up more left brained as they grow up.
hence why we put up so much time in trying to nuture them into becoming creative.
Hoever without the necessary stimuli, they are simple thinking creatures.
so you are right, creative people are likely to retain their right brain dominance into adulthood.
but that potential is lost as people grow old. also as we grow older, the opportunities to retain a creative lifestyle is limited as we are prone to develop skills which makes us more likely to earn money. If we could all live lives without the necessity to earn money to maintain a certain lifetyle, i think there would be a higher number of creative members of our society.
it's like anything, a naturally great runner will never make it if they don't undergo proper training. All natural skills we have in life need to be nutured to become something special.
I don't think children have the ability to do that on their own, otherwise the education system would be far shorter than just under two decades.