That's certainly the dominant narrative, but it flies in the face of superspreader events where it appears that one or a few people infected hundreds. Did they directly breathe on everybody they infected?
https://montreal.ctvnews.ca/outbreak-at-quebec-city-gym-link...
https://www.cdc.gov/mmwr/volumes/69/wr/mm6919e6.htm
https://elpais.com/especiales/coronavirus-covid-19/a-room-a-...