It’s not just common sense that tells us that learning to write ingeneral is not possible. Many studies of writing have been done—in workplaces, in classes across the college landscape, and in socialand civic settings.
Its important when you're making claims about a topic to always include evidence to support your idea. Simply saying that "many studies" have been taken with no actual proof of said study to back this claim up makes it feel sort of empty and that we just have to take this claim at face value