Thank you for the full disclosure, I think it adds weight to your post and no don’t worry I wasn’t going to argue with you about your distro choices, not at all.
I’m a very average Joe which also when into heaps of trouble when I tried to setup a Linux distro (mainly tried Pop_OS and Fedora KDE) so I feel the same as you 👌
I’m not sure I understand your question. I read pirated (DRM free) ebooks since 5-6 years on my Kindle Paperwhite and never had any trouble, even been using their ebook via email function without problems. I think they don’t care at all.