Some years ago, when I was working as production editor in New York, I had to manage a manuscript for a book of new-age woo that was trying to pass itself off as pseudo-science (one of these 'quantum magic' type books). Not only was the premise crap, but the author clearly did not understand even basic historical facts about science. I brought this up with the editor, who seemed surprised to be told that the author did not know what she was talking about. I'd guess the editor had not really read the manuscript very closely. I worked with the copyeditor to try to straighten some of it out, but it was pretty much futile.

The NY publishing system is set up so that editors spend most of their day doing tasks unrelated to actually editing their books, of which they have too many. It gets worse as you go up the food chain.