Indeed people are misunderstanding the concept of this game. It is designed solely as a tool to get people familiar with the wii remote, hence the twisting, pulling, turning on it's side etc. It basically offers an almost free remote and a few hours fun, the cow racing alone is worth the extra couple of pounds.
I think people are missing out on the whole philosophy of what Nintendo are trying to bring to the masses, they don't want us seduced by poor games with superb graphics, if you are then the Wii isn't the machine for you. They want people playing together and having fun together, Grandparents playing Tennis and Bowling because they know how to swing a bat/racquet etc without having to know special combos on the joypads, this is why the Wii is written as it is, with the 2 iis representing 2 people together, even thats innovative like most things Nintendo do.
The reviewers are correct, it isn't a great game, but it never set out to be, it is a teaching aid for a fiver extra and as such is excellent value - people should just enjoy this product.