Isn't this because when using a filesystem, we - in almost all cases - don't have relations between files we need to use? If I needed to look in a folder conta

Isn't this because when using a filesystem, we - in almost all cases - don't have relations between files we need to use? If I needed to look in a folder containing a million files, find a subset containing the word 'foo' and match to the 'joining' files in another 4 folders (all of which contain 500k+ files) - I think my code would resemble my filesystem more than my filesystem resembles my code.