There are many choices that need to be made when adapting a book into a TV show or movie. Some things work on the page but not on the screen, and some things simply need to be cut for time. This goes quadruple for a series of books as massive as Game of Thrones – the sheer volume of characters and subplots would render any adaptation a confusing mess. For the most part, HBO’s Game of Thrones has made a lot of smart choices, paring down the cast of characters and streamlining some of the stories. We can quibble about what has or hasn’t worked – someone like Shae gets more character development, while poor Melisandre is stripped of her complexity – but we can agree that some changes are necessary.
Having said all that, it’s hard to imagine that someone would read George R.R. Martins’ books and come to the conclusion that the audience needs to see even more rape and cruelty.