Covid-19 Thought For The Day #2

Ok, so we've already established that the very clever Covid-19 can differentiate between staff members, in a supermarket, and the general public. The latter having to wear masks because the nasty Covid-19 might lurk on surfaces and could get them; the former being safe and therefore not needing masks.

But then ...

When the same supermarket customer, me, goes straight from the supermarket and into the local public house/restaurant; I can sit down and order food & drink WITHOUT A MASK, but the staff members in the public house HAVE TO WEAR a mask? 

How does that work?

I mean, are we talking about more intelligence, and discernment, from Covid-19? It knows that in pubs and restaurants to LEAVE the paying customers alone, but now attack the staff members? That is one truly clever virus! Ok, so I am face nappy free in both situations ... but in the supermarket there is a danger to the customer from naughty Covid-19, but not in a pub? 

Staff members in supermarkets are safe from this lurking fiend, but are at risk in pubs?

How does that work? Personally, it sounds like government bullshit to me.