>Now, if the original copyrighted work can be extracted or reproduced from the model, that’s obviously copyright infringement.
I think there's an important distinction to be made here - "can" be reproduced isn't infringement, only actual reproduction is (and degrees thereof not consisting of sufficiently transformative or fair use).
Trivially a typewriter can reproduce a copyrighted book. Less trivially Google books, with iirc stores the full text of copywrited works has been judged to be legal.
I think there's an important distinction to be made here - "can" be reproduced isn't infringement, only actual reproduction is (and degrees thereof not consisting of sufficiently transformative or fair use).
Trivially a typewriter can reproduce a copyrighted book. Less trivially Google books, with iirc stores the full text of copywrited works has been judged to be legal.