6 feet of distance is completely irrelevant inside, but superfluous outside.
That seems to be a bold claim. Do you have a link to a page that goes into more detail on the evidence for it?
In fact the CDC is still saying not to use N95 masks, in order to prevent supply shortages. This is incredibly stupid—we are a whole year into covid-19, there is no excuse for supply shortages, and if people are told not to wear them then there will never be an incentive to make more of them.
Here in Germany Bavaria decided as a first step to make N95 masks required when using public transport and shopping and it’s possible that more German states will adopt this policy as time goes on.