Finding papers and digitizing them takes a a lot of work. Is nice that sone not for profits like archive.org do that work for no cost but expecting others to do it for you for free is what seems strange to me.

Archive.org, for example, does a lot of good work. But without too much hyperbole, there's essentially an infinite amount of paper with lines on it in libraries, historical societies, and private collections around the world. It's never going to all be digitized.