You're ranting. And while rants can be fun, they don't usually persuade anyone. Are you enjoying the rant, or trying to convince people?
This valid point is being lost in the midst of all the babble about evil governments and corporate conspiracies. Keep your talking points short and lucid, or you'll lose your audience.
How much fan fiction do you read? (Rhetorical question; the answer is obviously "little to none.")
1) You've managed to insult a large number of intelligent, articulate people who are often well-informed about IP law technicalities, and generally in favor of less restrictive applications of those laws.
2) You've shown yourself ignorant of the habits of several thousand readers and writers who've been actively fighting against copyright encroachment on fair use for over forty years.
3) If you don't think fan fiction is remixing popular culture, you obviously haven't been paying attention.
The Wind Done Gone? Fanfic.
My Jim? Fanfic.
Pride and Prejudice and Zombies? Fanfic.
Bored of the Rings? Fanfic.
The difference between those, and the stuff at
An Archive of Our Own, is that the ones at the archive (1) haven't been published in books and (2) don't have big lawyers to convince the original IP owners that they're parodies or transformative works.
(Except, of course, for the Shakespeare, Jane Austen & Sherlock Holmes fanfic, which could be published for profit without having to prove anything. The authors are having too much fun writing for friends to bother with the hassles. Also, the market for erotic Sherlock Holmes short stories is a limited one.)
I know fanfic--who writes it, why, who they write for, what they get out if it, what it can look like when it's done. You obviously don't. Knowing how wrong you are in your casual statement about fanfic, makes me question everything you have to say about topics I'm less familiar with.
If you want to persuade people, stick to topics you actually know. Right now, you sound like someone with a whole swarm of opinions that are mostly based on distorted understandings of topics you've looked at but not researched.