I'm sure it's probably a requirement from all the 3rd party media companies. They didn't seem to like VPNs either. But I also wouldn't be surprised if Netflix wants it to keep high quality versions at least off pirate sites.
But probably re-encodes, so filesizes are bigger for close enough quality. A direct crack of the encryption would be best from a space-quality perspective.
Doesn’t really matter much though in most of the world as it used to though.