I think this mentality only works if your collection is a couple hundred games. I have about 5000 games... not all of them are mint and it doesn't bug me in the least because I know how cheaply I acquired them over the years compared to their relative worth. Dont get me wrong, I don't buy absolute trash copies but when I'm picking up a ps3 game for $4, I don't care if there's a crease in the artwork or a bent manual as long as it's all there. If I did, I would have missed out on a lot of great deals---or had to pay a lot more on ebay for mint or sealed copies.
I agree and also - there's way to repair some of the damage done. Creases can flattened back with heavy books lighly ironing if it bothers someone that much.
And the vita cases are plastic and resistant to ispropyl-rubbing alcohol cleaning if you remove the artwork manual. I feel like many of us don't 'expect' to find it in mint condition and are willing to put in the time/effort/elbow grease when appropriate.