Well that's not always true either.
For example, when I went looking for posts with "Super Search" in the title and typed "Super Search" into the searchbox, it took me straight to the Super Search page.
I've had similar experiences when searching for articles on common Perl modules...I recently searched on "crypt" and I was taken straight to the crypt perldoc
Each of these gave no option to go elsewhere.
And in the cases where the "To search more than just titles" line appears...Perhaps it's just me, but my eyes immediately key on the results, semi-ignoring the surrounding text. I mean, who really fully groks the whole "Below are some nodes whose titles contain these words..." line every time they do a search? Instead, the eyes just subconsciously glance over that information and go straight to the results. Where the bold probably helps for the Super Search recommendation line, I guess it didn't help enough in my case ;)