Satire does have a way of summing things up far more effectively than polemics and invective. A retired pharmacist friend of mine tried last year to convince me of the effectiveness of masks in preventing exposure to Covid by sending me a photo of masked surgeons working over patient in an operating theater. Didn’t bother to reply since but thought to myself “Yeah, if I was standing over an opened steaming torso of a diseased person I’d be wearing a mask too”. Walking around the aisles of my local five and dime?
Actually the simple paper surgical surgical team wears is to prevent any extra infection to the patient. After all, IF THEY HAVE THEIR INARDS EXPOSED, they are very vulnerable to it!
The shields are more for the protection of the medical staff, as you indicated from blood and any junk flying at them.
The thing is we do not have large wounds walking around in public from which to get sepsis. That is what skin is for.