The vast majority of DRM protected content (or at least majority by watch time) available in UHD via torrent in a matter of hours. People like to stay away from torrents, because it carries significant risk in many jurisdictions. But the only reason UHD versions are only available via torrent and often not as streams or downloads is bandwidth cost. I can't see how it has any thing todo with DRM. The only thing it maybe cut's down is sharing within friend groups. But even then it only takes one to figure out how to set up a VPN for torrenting.