the act of writing takes raw experience, puts it in front of the eyes, and then filters it back through your critical faculties so you can refine and reason about it. the iteration makes it higher quality thought.

making writing valuable is another skill (see this evergreen lecture from the university of chicago leadership lab: https://www.youtube.com/watch?v=aFwVf5a3pZM)

however when I encounter people with low written or verbal acuity, they have to survive somehow, so it's wise to observe what tools of cunning they tend to reach for.