There's a difference between using a sharp knife, and a hammer that has been sharpened on one side so that it's usable as a knife, and pointy on another side so that it can be used as a weapon in case of a home intrusion, while keeping one side as an actual hammer and the handle is covered in honey for more friction in case your hands get sweaty.
Both can be unsafe, but one is a professional tool while the other is an abomination for our current standards.
I find most 'footguns' to be normal expected behavior, and the user shot themselves in the foot because they're careless or ignorant.