The point here is that there are varying shades of morality. It's not just right and wrong, good and evil. Some people believe that games should be purchased sight unseen, others believe that games need to prove themselves first. Some people think piracy is inherently evil, other people simply see it as a means to an end. To assume that everyone has the same morals is a bit shortsighted.
Are you really trying to suggest that stealing is alright? And yes, that's what it is - getting a product without paying for it. Obviously it's not but people try to justify it to themselves, convince themselves that it's okay when they know really it's not. That's all this is... people trying to justify piracy because they don't want to pay for games. By occasionally buying a game pirates ease their conscience and justify it in their mind. What's the excuse this time? Lack of a demo? Too expensive? Bloated? Poor narrative? Too short? Not polished enough?