Yeah, I don’t trust that style of robot. Unless I’m mistaken, that’s an industrial grade robot meant for things like manufacturing lines. It’s not designed to be operated on/near humans. I would bet it has enough power in its joints to kill or severely maim a person.

Machines doing these sorts of operations on humans either need ludicrous safety measures, (like you would find on million dollar medical machinery,) or compliance engineering so that even if the machine malfunctions no harm is likely. I highly doubt their off the shelf machine has been modified in either way to make it truly safe.