That's actually not what copyright is for. Copyright was made to enhance the public culture by promoting the creation of art.

If these record label types impede public culture then they are antithetical to copyright

All the philosophical arguments about the nature of ideas and learning, and how much a machine may be like a person don’t change that if anyone dedicates years of their efforts to develop their skills only to be undercut by an AI who was trained on their own works, is an incredibly shitty position to be in.

So should Dread Zeplin be hauled off to jail because they created derivative works without permission? I mean maybe they should, but not for copyright imo. How about the fan Star Wars movies getting their balls sued off by Disney?

writers and artists’ livelihoods are being threatened by AIs who were trained on their work without their consent or compensation

Guess what? The actual copyright owners of the world; those who own tens of thousands or millions of copyrighted works, will be the precise individuals paying for and developing that kind of automation, and in the current legal interpretation of copyright, its their property to do so with. This outrage masturbation the internet is engaged in ignores the current reality of copyright, that its not small makers and artists benefiting from it but billion dollar multinational corporations benefiting from it.

This is a philosophical argument and an important one: Should we legally constrain the flow and use of ideas because an individuals right to extract profit from an idea.

I don't think so.