I have found that most general users of Word don't even bother setting up and using the styles at all - they just leave it in the default Normal mode and then apply the formatting then want to it for each and every paragraph/line/word/letter on the screen.
Word isn't intiuitive. If the users don't know they even need to setup styles then how are they going to figure it out? Clippy needs to come back and educate the users.
Not that anyone else has done it any better of course. Word processing is a very hard application to get right because you have to apply structure to something that has no structure.