It takes skill to bring something you've imagined into the world: to use words to create believable lives, to select the colors and textures of paint to represent a haystack at sunset, to combine ingredients to make a flavorful dish. No on is born with that skill. It is developed through exercise, through repetition, through a blend of learning and reflection that's both painstaking and rewarding.
This is a great explanation for separating creativity and skill. From this perspective, the creative part is very similar to how people think of "vision" with business. No matter how creative you are or how much vision you have, actually doing it is still hard.