Please don't say things like that. It's not true.
Just because your a very clean person, doesn't mean everyone else is.
My father is extremely bad about keeping his house clean. Not to that extent, but it's bad. He's not psychotic, just extremely busy and lazy. Some people 'wrongfully' find comfort in filth.
If anyone has ever watched animal cops/precinct shows, you will know that this is not nearly as bad as it could be. Imagine twice the amount of filth with cat and dog waste pasted on top. I've seen a house similar to this unfortunately. The worst part is the SMELL.