tldr the author argues existing law covers copyright infringement well enough, because human and neural networks are alike so the remixes and recreations of one are like the other.
If one can accept that notion, which has been under development for over 40 years by my count, then all creative human endeavor itself has to be a copyright violation. We all use neural networks (our brains) to take in as much information as possible (most of it copyrighted). We reorganize it and also answer questions in the same way AI does.
They do end up admitting the situation is somewhat different though as the laws were created assuming a human couldn't store a piece of work perfectly in memory. Their solution is to ask machines to do what humans do: buy a copy/license of the work.
This makes sense to me, but I also don't rely on copyright to get paid.