I tend to agree with your sentiment but this line made me think you’re underestimating the degree to which the law stops the powerful from doing evil. They see the law as a hassle to be calculated against and if there is no legal friction to stealing and using others’ creations they just will.
So it’s not that Amazon would take your novel, short story, etc and redistribute it. It’s that they’d make a whole series of movies or TV series using your creations and give you nothing and have to give you nothing.
Copyright being eliminated is among my more “idealistically anarchistic” wishes I think but so long as we’re in a society as legalistic and with such an imbalance of power generally, copyright protects more than it hurts I think.