> The entertainment industry has a lot of people who just want to get their job done and go home, just like any other industry.

I think another reason, in addition to yours, is that the entertainment industry sees their products are disposable, or want them to be disposable. This way they can pull the drain plug from the pool, so they can pump in new content into it. Otherwise, listening same good old songs will inevitably eat into profitability of the new releases, because you can watch/listen for so long in a given time.

BTW, I don't share the same views with "the entertainment industry". You can't get the good old albums from my cold, dead hands.