Would You Trust a Robot to Give Your Grandmother Her Meds?

Why do we get nervous when we think about robots working among us instead of tethered to the factory floor? We're already dependent on hundreds if not thousands of automated systems and processes. We fly on planes that fly themselves. Our electrical grid can redirect itself to avoid power outages. We expect these systems to be reliable and safe, and to do what they've been programmed to do and nothing more.