Microsoft and application developers treat the Documents folder like a total dumping ground for whatever random nonsense they can dream up. No wonder people look elsewhere. Need to store user files? Documents. A database? Documents. Giant cache files? Documents. Config? Documents. Executables? Fuck it put those in Documents too.
Why would I ever store my real documents in a folder so littered with shit that I can never find anything? It's not like the search actually works.
Also as a Linux user myself and to head off any smugness, developers do the same thing with the home directory so users end up inventing weird ways to stay organized.