Ha the petri dish thing is the dumbest thing I hear related to cruise ships

I’m a critical care/trauma nurse. I’ve worked my entire career in hospitals. I challenge you to find a place in your favorite hospital, say the icu waiting room or the dining room. Sit there for a couple of hours and count the number of cleaning staff that come by cleaning up. Then book yourself a cruise and find a place (anywhere) to sit for a couple of hours and count the number of staff you see coming by mopping and wiping down all surfaces. The disparity will shock you. I’ve done it and never gone more than 3 minutes without seeing someone. Heck in my last ICU our housekeeper also took care of the waiting room. I guarantee some days she never entered it!