No Spoilers: HBO's Game of Thrones won't spoil the books for me Part 1

HBO's Game of Thrones has surpassed the published material of George R.R. Martin's A Song of Ice and Fire series. Will the plot liberties showrunners have taken spoil the upcoming books?

Articles have been written about this. Friends have asked me about it. My response:  I'm not worried at all. Here's why.

It takes Roy Dotrice about 208 hours to read the first 5 Song of Ice and Fire audio books. I will assume approximately 80 hours for the final two books. HBO's adaptation of Game of Thrones averages about 55 minutes per episode but let's assume an hour for each over 6 seasons and estimate the series so far at 60 hours of content. It has been confirmed that the HBO series will complete the series in 2 additional seasons with a shorter episode count. At this point, 13 episodes all together until the series finale. 

After all is said and done:
Show only watchers: 73 hours of story.
Book readers: 288 hours of story including the last 2 books. (This doesn't even include the World of Ice and Fire, Knights of the Realm, and countless hours one can spend theory-crafting characters and plot lines)


My non-spoiler examples of why the show couldn't possibly ruin the book for me:

1. At least 5 main characters with complex story lines in the books, don't even EXIST on the show.
2. At least 5 characters that are dead on the show  are still alive in the books.
3. At least 5 story lines on the show are not even close to their book arcs (Sansa, Dorne, The North Remembers, to name a few)
4. At least 5 character journeys in the books have not happened in the show.
5. Last but not least, George R.R. Martin hasn't decided on the ending of the series but says it will have a bittersweet ending (in the vein of Tolkien's Lord of the Rings Trilogy). Even HBO showrunners agree that the show won't spoil the books. 

My approach to the HBO show and the ASOIAF books is to treat them as two totally different obsessions. Both are amazing and both approach the story in different ways but book readers are without a doubt  treated to so much more.