The audio is very long, and goes through the history of copyright, DRM etc.
What's the argument that applies here, in a nutshell?
Software can be malware, but a book can't.
It's just not the same category to me.
(You seem to differentiate text books and manuals from say, a novel or a
comic, but I'm not sure of that).
If it can't be distributed commercially,
It's still accessible, modifiable and can be distributed, just not for a fee.
It simply prevents people from abusing the author, without restraining the
user's freedom.
Best of both worlds, it's fair to both parties.
How is that non-ethical?