The reason why EME didn't lead to a catastrophic downfall of freedom on the Web is purely a function of DRM being expensive to license. Netflix can afford it but not YouTube, and YouTube creators generally don't want it[0].
Related note: if YouTube starts putting DRM on videos then every creator that's ever used Kevin Macleod music is now violating the Creative Commons anti-DRM clause. YouTube actually added a feature to mark your video as CC-BY or CC-BY-SA, so they'd be at least marginally aware of this clause, so they'd have to at least make DRM opt-in.
[0] To be clear, this is moreso that what YouTubers are actually worried about is reuploading content back to YouTube and monetizing it. They don't care so much if you have a stream-ripped copy on your computer that you just watch on your own. But things like Content ID actually work way better for preventing reuploading.