Don't blame Apple.
Many rules that Apple has to follow demanded by the Motion Picture Industry of America.
Apple has to be able to prevent content piracy and copyright/trademark issues to be able to supply commercial movies and TV content to its devices and users.
So, Apple, by necessity, and to supply such commercial movie and TV content, needs to enforce ALL Motion Picture Industry DRM rules and demands.
That means locking down all purchased or rented such as commercial music/movies, videos and TV shows/series content to inside of any Apple device to a single location that cannot be moved around inside of the device or computer.
It is the way it is.