Just because some shitheads use the name of a previous work does not mean they have anything to do with it.
"Star Wars" 7 8 and 9 are not Star Wars.
The new "Lord of the Rings" is not the Lord of the Rings.
Don't let those who hate you pretend like they are the continuation of authors once respected.
They are skincrawlers; they use the name without any respect for the soul.
Uh-huh, it's how you pave the way for a new Holy Book of Canon, that mustn't be messed with by the vulgate, and, of course, its narrative never questioned.
Frankly, I think a lot of what got passed down to us from ancient times amounted to "fan-fiction", while the priests, of course, tried to exercise their own primitive forms of copyright.
The Reynard cycle might be a good example of this; The Romance of Reynard is just a collection of stories that connect in a kind of narrative, while the bulk of the stories told at the time they were popular would have been mostly oral and just made up by townsfolk who liked the characters (and how they could be used to poke fun at the nobles and clergy.)
In short, I think Western society has been through all this before.