He says work is meant to be interesting engaging and meaningful... It would be great if that were true... But that is written nowhere. Work is simply things that need to be completed that someone else is willing to pay for. Any other definition is you projecting your ideals onto what the task really is.
So to answer the question: why are so many jobs crappy? Because that is the way things have always been.
If you enjoy your work (like I do), count yourself lucky.