By your calculations the 4k blu-ray box set for Lord of the Rings, Return of the King would take 5 triple layered disks (for both the extended and theatrical versions it comes with) for just the video and no audio or anything else like the behind the scenes content when the box set only comes with 9 disks for all 3 movies. Likely not using the full bitrate you provided but still. Hard to say they aren’t getting really high quality content on the screen.
By your calculations the 4k blu-ray box set for Lord of the Rings, Return of the King would take 5 triple layered disks (for both the extended and theatrical versions it comes with) for just the video and no audio or anything else like the behind the scenes content when the box set only comes with 9 disks for all 3 movies. Likely not using the full bitrate you provided but still. Hard to say they aren’t getting really high quality content on the screen.