After all, they are descendants of big, dangerous lions and other wild cats, which doubtlessly have eaten many humans in the past, and probably continue to do so in some places even today.
Yet we for some reason find these tame, small versions of the "real deal" very cute. Even though they are still usually very arrogant, selfish, sadistic and whatnot, even when not physically posing a threat to humans.
Actually, I find even lions and leopards and pumas and cheetahs and tigers to look "cute", even though I wouldn't try to pet one for obvious reasons. I like the idea of truly dangerous cats not eating me and acting like "guard cats", but I wouldn't risk it even though there have been such cases where a human got accepted by lions who could kill him in an instant, yet don't.
I hate "eight-legged freaks" (spiders), yet I cuddle all the time with a four-legged beast which is much bigger. I would never stop washing my hands if I ever so much as touched a spider, but I can drill in my face into the fur of my cat and can't get enough of petting him and giving him expensive cat food and letting him in and out from the balcony door, etc.
It doesn't make sense to me. What is it about these furry animals with tails that is so appealing to many of us? It seems so natural for there to be a fluffy cat in here, sleeping/relaxing most of the time, but really, it's just a slightly-less-wild mini version of a lion, and who knows what he'd actually do if he were "full-size"? Probably eat me for closing the kitchen door on him...