Eh, I dunno. Someone who only has discs or carts (or even digital games) and couldn't care less about the box or manuals or physical bits and bobs might make the same assumptions about those who prefer CIB. It's all relative. People will draw the line in different places.
I'm one of those people who mainly goes for cart only when it comes to frail cardboard boxes (don't like them and having to baby my stuff), but I can appreciate a CIB collector because the person will post interesting pics of the contents (see D.Lo's recent MM acquisition in the NES thread) and that person will also play the game. The material is being enjoyed as intended. The sealed collector stares at the outside of the box, on a shelf or mantle, and does nothing with it.