WHAT POSSIBLE DIFFERENCE does it make if someone is wearing rubber gloves???

If they touch their nose, their mouth, their butt - - anything - - they are still passing on "diseases" as our society likes to say. 

Most people don't have the first clue about what a virus is or how it works, or what it ISN'T.  Ditto, and especially so, for "germs".  Most people haven't a clue what a "germ" consists of or even if they exist.  But that's another discussion.

In some settings rubber gloves are an absolute necessity.  But in the case of serving up "fast food", stocking shelves in a grocery store and the like, I can see no good reason for the damned things. 

We have gone over the edge here in the USA.