The individuals who get rich from copyright are a rarity.
Most mid-list authors make very little from copyright. A lot of the "authors" who make a lot of money from writing are celebs who slap their name on a ghost written work.
> Which was always better for them than let Twitch take 70% and be a sharecropper.
Copyright predates Twitch or giant corporations and was designed to protect the profits of the publishers from the start.
This is so, but note that publishers were the "giant corporations" of the time.
In this nothing changed. Authors never were and still are not the point of copyright/IP.
Giant corporations started in the early 1600s and back then they had gunboats :-p