How many cats have you lost to rattle snakes?
I don’t know that we have ever lost a cat to the snakes. With the cats around we have fewer snakes, fewer snakes means less threat from snakes to both human and animal life.
So did this ‘yote sneak up completely unnoticed and grab the kid? Or maybe the family thought it was cute and let it get too close. In SoCal, I suspect the latter.