YANBU!!!!!!!!!!!!!!
This pisses me off so much I could scream. I know several people who are struggling authors and they are VERY good. But they cannot even get their stuff read by anyone, or even get an agent, because of people who are already famous/married to someone famous, bagging all the book deals, for their 'novels' or their 'memoirs!' (Katie Price anyone?!)
It makes me sick.
The book publishers do have to take the lion's share of the blame though, because this is basically THEIR doing. They will rarely take a chance on a nobody now. J K Rowling would probably not get signed now, even though she is a very good writer, and the Harry Potter novels are wonderful.
It's the same with actors/singers/performers. Many of them are related to people famous, and get a back door straight into the industry.
I know that some people who are related to famous people are talented, but some are not that good (Jayden Smith anyone!) 
And these people being pushed ahead for film and tv roles over and above people with no contacts or relatives in the industry, makes it very hard, if not virtually impossible for 'nobodies' to make it.
Giovanna Fletcher is one 'author' who does my head in. If she had not been married to Tom from McFly, she would never have got a book deal. Her work isn't even that good.
Performing arts/film/tv/music/literature these days, is full of people who are related to other famous people, and people who are from upper middle class/privileged backgrounds.
The days of some random talent from the back end of nowhere becoming successful and famous in film/tv/book writing are gone.
And like you @quipsandquotes I am sick to death of 'celebrities' bagging all the book deals for their frankly, quite SHIT books! 