We don't all get smacked in the face by the scanners
Who among us hasn't gotten fishing line in our mouth going through a house at one time or another. A "breathing virus" spread by the combination of an infected person exhaling water particles carrying the virus and the inhalation by a non-infected person with stuff hanging at face height is definitely a potential risk. Most scientists believe you have to be conversing with an infected person for a significant period of time to get enough droplets, but who knows with the latest (and as yet undiscovered) variants.