Book or not, rabbits in the wild don't get pellets so saying it is 'virtually impossible' would be incorrect. Sure they get their teeth on loads of stuff, but I doubt they are finding themselves 12 veggies daily. And like I said, my rabbits do get pellets to supplement to be sure that they get a bit of everything, they just get less of it. Just because it's in a book, doesn't make it fact
Go read previous books on rabbits and you'll see how much truth there is in that statement. Either way, my buns do great on this method and I don't feel there is anything wrong with it. If you feel it's wrong, you are entitled to your opinion, and free to do what you choose with your own but I don't have to accept it just because one person in one book said so. I can find you another book which says this method is the one they recommend and where does that leave us? Simply leaves us to what we prefer for our buns and what is and isn't available to us.