If I read a lot of fantasy books as a kid, then start writing my own fantasy book, should I have to pay royalties to the authors of the books I read?
Most jobs require a degree or certification of some sort.
If the answer to those three questions is "yes", then I would argue that yes, you absolutely should have to pay royalties to the authors.
Copyright lobbies can't have their own cake and eat it too, if you want to enforce such a different way of thinking about copyright compared to the current one, that would destroy the current industry and rightly so.
I could just as well argue that businesses developing or making use of LLMs can't have their cake and eat it too. If they want their computer programs to enjoy the same rights and prerogatives as human creators do, they should be ready to demonstrate that those models are truly moral agents, with their own lived experiences, and thus deserve the status of legal persons as of themselves subject to the same laws and obligations as human beings.
I don't think they care about that, they seems fine with output images not being copyrightable as per the current legislation.
That's a dead-end to start having to pay each and every one of the original sources of the components of your mind each time they are used to create!
If you're commercializing e.g. goodies that use the exact same character designed by some artist, so that anybody can tell you it's the same, AND if the traits of this character are actually original (not just so that anybody would come up with it independently), AND if the people buying your goodies are all thinking about the original character in the first place, AND if the original author is alive, then I'd absolutely agree that royalties need to be paid.
That's just an example. To tell you that in specific cases it's obvious that royalties are required.
But in the general case, no. Because, else, anything just is a derived work. Just think about it.
The world of ideas is liquid. All is mixing, all dissolves and disappears in everything else, and is reborn new and different, again and again.