They don't contribute to society in any way except to kill mouses, and some of them can't bother themselves from playing with yarn to even do that. If you were being murdered, they'd yawn, lick themselves and just watch like it was a regular day at the store. They're lazy and only eat and sleep, and on top of that they think they're hot shit just because they're more elegant than dogs. They aren't loyal and if you let them outside, they will leave for days sometimes, sleeping around with all sorts of other slutty stray cats, impregnating them without any regard for the children, then return expecting to be fed and catered to.
Many of them are mean and stuck up. My aunts cat was evil, and any time I'd fall asleep and it had access to my room, it would sit on my head or rub up against my face. Horrible way to be woken up.
I think the only advantage of having a cat over a dog is that they're less of a commitment. So yeah, in conclusion, cats suck.