They’re banning it because testing has shown that bacteria can mutate to become resistant, and there are antibiotics that work via the same pathway. We’re running out of effective antibiotics, need to protect the efficacy of those remaining.
People have good reason to be concerned, what with MRSA and others, but I don’t think most understand that simple, regular soap worked to a lather and warm water is highly effective under most circumstances. If I were in a hospital or even doctor’s office, I’d want an alcohol-based hand sanitizer, not antibacterial soap. Alcohol kills bacteria.
Bacteria are also mutating to handle refrigeration. Fedzilla will next ban refrigerator ownership among the hoi polloi, except for themselves.