Earlier quoted context omitted.
This should help make it clear: https://science.sciencemag.org/content/sci/368/6498/1422/F1.... Masks do more to protect others than they do you. Which is why we are safest when everyone wears a mask.
Which is why I get annoyed at the flood of maskless wonders in UK shops since 'freedom day' (I am 65, and have a chronic respiratory illness). And I wonder whether the Great Unmasked coincides with the Great Unvaccinated.
When the checkout queue is moving slowly, some people try to move the queue forward by moving closer tho the person in front, even though the queue hasn't moved. I've noticed that people who do this are always maskless.
My local store is near a homeless shelter; homeless people face much greater threats than what amounts to a nasty respiratory virus. But I like social distancing; it tends to improve my sense of having personal space, as well as making me feel safer.