I'm reading "Escape" by Carolyn Jessop... and the writing is terrible. Did nobody notice before it got published?

I get the whole book deal thing that happens to someone who does something extraordinary and/or pressworthy. People want to read about these experiences and the more sensational the better.

This book is about her escape from the FLDS (for those who may have been living under a rock in April 2008, that’s the polygamist cult that was raided and 400something children were taken away from their parents for suspected sexual/other abuses)... and her writing is absolutely terrible. Sentences that really don’t have much business being in their paragraphs, paragraphs in which the content doesn’t really flow, among other things.

Lots of people had to read this before it was actually printed, and it had to have been edited by probably more than one someone. Does the writing matter less if it’s non-fiction? Are publishers more concerned with getting a book with this sort of content out as soon as possible, knowing the sensationalism will get it snatched right off the shelves, regardless of whether or not it’s quality work?