> do they think if they get the disc, they can just hold and be able to play that disk for decades or just copy to drive they have?

We can legally back-up owned discs to hdd or whatever other media in my country, including to the cloud. I can use the original media or any such backups as many times as I want, forever.

We can also sell a "hard media" copy wheven we want. IP owners cannot take away that right from us. Of course you must delete your backups if you sell the original media.

With digital "purchases" neither of these is true anymore. That's where the outrage comes from.