@freemo From the study. Did you read it? (I feel like you're now arguing to argue. Your point was theoretical, not practical and related to the study.)
If you want to argue with the study authors, please do so. I am not going to engage in a rather silly discussion of whether inches or feet matter when the study is accurate in ways that matter (which isn't whether someone moving six inches changes risk but that people underestimate the importance of distance from infected persons.)