I think I explained what I was talking about rather well. Trying to view a piece of media in its highest release format isn't something that's always feasible. Anything even a few years old can to difficult to source. Ask anyone rebuilding a library after a drive failure. It's even worse if what you're trying to get had low viewership - it means an even smaller pool of people bothering to host the data.
While I'm sure this is a niche situation within a niche situation, hosting your own media library locally allows offline playback. Quite nice in during a thunderstorm. Not an option with what you've described as your methods, but again, definitely an uncommon use case.