Again, in retail expecting "money back" because of a mistake in understanding the product is a normal part of doing business. "This shirt doesn't fit me." "Sorry, my husband wanted one in the other color." "I thought I could stream torrented files with it".

The point is that the distinction doesn't matter, so any argument (for or against) predicated on what the buyer expects or what the seller advertised is limited to the ability to refund the purchase price -- it's a dumb argument, basically. It does what it does.