One of the big publishers put heavy pressure on Amazon to patch this exploit or else they would pull all their content from the platform (or so I was told).
(I worked at Kindle 2017-2019, and was on the team that wrote the code that OP reversed engineered)
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
Thanks to Apple
>many video games are also sold without digital restrictions
Thanks to GoG and (to a lesser extent) Steam
Personally, I buy more music now than any other time in my life: high quality sources playable on all my devices.
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.