We've all seen how oblivious the Pattersons are to the world around them and wondered why. We've also noticed that they can't really see the world from any viewpoint than their own, that other people and things aren't really real to them, that they only exist to either benefit or hurt them. Their dreary narcissism is, sadly, the direct cause of their lack of attention to their surroundings. I put it to you (and knowingly repeat myself) that the Patterson family are so wrapped up in themselves, they simply can't be bothered to look where they're going because they think the world is designed for their comfort and theirs alone. This, I say again (because it's a damn good point and bears repeating) explains their idiot consternation when other wills collide with their own and events not unfold to their advantage.