If you're talking about the ability to write a novel, I agree with you. But you have to learn how to get your thoughts down on paper in a way that is intelligib

If you're talking about the ability to write a novel, I agree with you. But you have to learn how to get your thoughts down on paper in a way that is intelligible by other humans, and that's a technical skill that must be learned through repetition and critique. There's a basic technical skill to writing long form content, and many kids don't get it because their teacher doesn't have time to grade 140 papers.