Dummies Game Series for Casual Games? Duh!

I found this really quite stupid. Well at least, at first. Then I got curious and read what I can about the rumored Dummies Game series which will be developed by EA Casual Studios.
Why make a game out of the popular dummies book? I mean, casual games are supposed to be titles that have a low learning curve, and to publish a full tutorial game about one just doesn’t make sense.