Amazon has exercised substantial market power to get publishers to do what they want. If they really wanted to, they could have pushed back just like they have in other areas.
For one thing, DRM also works in Amazon's favour (reselling multiple copies)
For another, DRM is a pretty big sticking point for copyright holders, music, text, whatever. It's the one big thing that publishers all think that their business model depends on
Personally, I buy more music now than any other time in my life: high quality sources playable on all my devices.
Thanks to Apple
>many video games are also sold without digital restrictions
Thanks to GoG and (to a lesser extent) Steam
The point you are responding to is at least partially true. Re-read it and see. Your brutal "No" only serves to discredit your own (partially true) argument.