Personally I think this is a great book, I found the Head First style quite annoying at first but considered their reasoning and found it works well.
I found this a really good book to learn how to put patterns into practice.
Yes, applying patterns unnecessarily is foolish and dangerous, maybe their caveat should have been right at the beginning of the book, but if you do a lot of reading around software dev you should be aware of KISS and YAGNI and hopefully you are of the mindset that these things are just tools for the box, not something to be applied everywhere you possibly can.
Anyway, I think your point is totally valid, however I think this book is a good resource.