I feel like most of OSINT is more manual than these lists lead to believe. Or if not, most of it relies on already-built massive archives or tools that scrape those archives.
Agreed. This list is obviously tilted toward computer security; OSINT also targets nation states and political actors, and more often than not that's through non-technical means (ie looking for information carelessly left public rather than exploiting vulnerabilities to gain access to private information).
absolutely. it's just useful for a quick overview. real research happens when you keep digging where others haven't.