Earlier quoted context omitted.
Also that's often comparing the discounted price of a print edition to the full price of the ebook. Print books being still sold under the old wholesale model, Amazon can still discount them, whereas ebooks being sold under the new model, Amazon can't discount them.
When I'm looking at prices at an online bookstore, I don't care what the list price is, I care what the price I have to pay is. When a physical object that has to be manufactured and shipped costs more than a text file, I feel ripped off. Especially since I can lend a physical book to someone or sell it to a local used book store, neither of which I can do with an ebook.
Also when lending books to people you have to know them well, and then follow up if you ever want the book returned.