with books there's basically no reasonable way to create an ebook from a hardcopy
On the contrary, tons of books have been digitized from hard copies through a combination of OCR and manual editing. (E.g.: Project Gutenberg.) The same basic process works for both printed books and pages displayed on an e-reader. It's quite tedious but not exactly difficult. Anyone with a smartphone can submit usable scans, though some simple DIY equipment speeds up the process and improves the quality, and OCR is getting better all the time.
In the worst case the book can simply be retyped. People used to copy books by hand after all, using nothing more sophisticated than pen/quill and paper/parchment/papyrus. Unlike in those days the manual effort is only needed once per title, not per copy.
The average person would just download it. Only one needs the equipment to digitize it. And that equipment isn't as specialized as you seem to think. For printed (mass-produced) books you can just cut the pages from the spine and feed them in batches through an automated document feeder, which comes standard with many consumer-grade scanners. Automated page-turning on an e-reader can be done with a software plugin in some cases, or externally with something like a SwitchBot. Capturing copy-restricted video is frankly much more involved, and that hasn't stopped anyone so far.