Who is going to teach 18-year-olds sentence structure or remedial algebra at 11 in the morning for a fun side-gig? The independently wealthy? Adjuncting in law

Who is going to teach 18-year-olds sentence structure or remedial algebra at 11 in the morning for a fun side-gig? The independently wealthy? Adjuncting in law and business schools is a very different gig than the folks teaching English, history, math, physics, sociology, art, etc.