I knew those people where out there, but there are almost as many people googling "google" as "youtube". Why? How many just want to get to google, and how many or doing something intelligent?
I used to think this was dumb as well, until I realized that if you type "google" into the address bar of Chrome, Firefox, or Safari (possibly IE too, I haven't used it since IE6), it runs a Google search. Nobody ever bothers with the .com anymore; why should they, when just typing the name of the site in will get to it? So a sizable number of people who go to Google Search get there by running a Google Search.
Also, a surprisingly large fraction of users cannot touch-type. They've been trained to go to Google to search, so they type in g-o-o-g-l-e-ENTER and get where they intended, and never notice the autocomplete suggestions showing up in the Omnibox or the fact that they could just type their whole query in and get answers.
