There's a general misalignment of incentives in educational writing. As an author you want the maximum audience, which is gotten with a mixture of banal conten

There's a general misalignment of incentives in educational writing. As an author you want the maximum audience, which is gotten with a mixture of banal content and a bit of FOMO. This is because there are more beginners in almost anything, than there are more advanced people. There's overall no real incentive to make these people to actually learn something, as that would remove them from the audience.