Consider a lathe. It's a machine tool that "wants" to kill you. Machinists can use them for entire careers because the risks are well understood and a culture o

Consider a lathe. It's a machine tool that "wants" to kill you. Machinists can use them for entire careers because the risks are well understood and a culture of safety is enforced in the workplace. The main task is to keep yourself and any dangling bits out of it's reach. A useful home robot needs to have about the same level of force available to complete tasks. The range of side effects is unlimited, and there is no culture of safety, and there are kids and pets in the mix. You're just asking for trouble that really can't be avoided through technical means.