The idea of a kind of higher-order Eternal September, where the flood of newbies and low-value content is from educators, instead of students/"true newbies", is

The idea of a kind of higher-order Eternal September, where the flood of newbies and low-value content is from educators, instead of students/"true newbies", is interesting. I wonder what causes it? Maybe some vague desire by educators to "teach something old for the sake of seeing alternate technologies" or something.