Bambu has offices in the US, and sells products there, and orca is also distributed there, so Bambu is trying to take advantage of the laws they think will benefit them.
However, DMCA wouldn't apply according to the video. Mr. French says Bambu effectively left the back door unlocked.

At least with down, the duvet cover can be washed more often than the duvet. Plus you can change the color or design without wasting as much material buying a whole new duvet/comforter.