The mean human gets a middling score in creative writing tasks at the end of their mandatory education, and most then leave school and forget what little they ever learned outside whatever their career path happened to be.

Most humans never do a creative writing course after school, and the longest fiction most people will write is their resume description of what their previous jobs involved, or perhaps their dating profile.

Don't mistake what you see published (or what your friends are like) for the average human: the average Hacker News comment easily above the writing grade (and creativity) of e.g. many of the one-shots stories I've seen attempted on some creative writing subreddits. "Mean" is not a high bar.