All books, fiction or not, are going to have some sort of authorial perspective that shapes the work. It's going to help determine what is emphasized, if characters will be rewarded or punished for behavior that may be moral but be socially unacceptable (or vice versa), etc

That said I was SO FRUSTRATED with The Atlas Six by Olivie Blake. In the first 100 pages, I learned that she thought bangs/fringe looked stupid. It was covered multiple times from multiple POV characters. It absolutely drove me up the wall- I knew the author's opinion on a hairstyle better than I knew most of the characters' opinions on anything. That, I feel, was too much.