You made some great points. For me, I think of copyright and protecting specific works, like entire books, articles, etc - not derivatives. But as you pointed out, that is not how it is applied. It is frequently abused to crush and stifle things that are clearly NOT copies.
I suppose I should say I am not opposed to the concept of copyright in very narrow conceptual terms, rather than current real-world applications.
I just like how overtly humanist and socialist Jesus’ teachings are. “Rich people are evil. Be good to others and share everything you have with those in need. If you don’t, my daddy takes that personally and will burn you like the trash you are at the end of time.”
It’s wholesome.