Manufacturers make things difficult to repair, use nonstandard components and tools that you can't get from a third party, they glue things together in such a way that you have to have break it to get inside, they take away your warranty if you do anything they don´t want you to do, and so on.

This dispute is all about not letting manufacturers use such tactics. I see it also as an ecological issue, because unrepairable and upgradeable stuff means more garbage.