Yeah, I understand... typically books are better than movies... but I remember hearing the differences of I Am Legend book vs movie, and there was something in the book that clearly should have been in the movie and it wasn't. I just remember hearing a lot of people were like, what, really? As if it was something obvious that should have been in but wasn't.
But I haven't read the book or seen the movie. It's just what I've heard so I really have nothing to offer in terms of an opinion.