I assume people, (even tech savvy HN readers) access sites as a search because it's less effort than urls, typo resistant, and almost all browsers installed now

I assume people, (even tech savvy HN readers) access sites as a search because it's less effort than urls, typo resistant, and almost all browsers installed now have search built in - it's not a sign of a naïve user. However, i'd assume for Facebook a much larger % of users are now via smartphones - so get their fix directly through the app, with no search engine involvement.