It absolutely isn't. Noone says that the virus cannot be transmitted by keeping that distance, but it certainly does reduce the likelihood. They've worked out that's the distance of optimum inconvenience Vs reward based on expertise and evidence that you do not have, they haven't just pulled a number out of their arses. It also creates a just out of arms length buffer against physical contact, which where the huge risk lies.
A few people thinking they know better will be the downfall of us all...
A few people as in scientists you mean who have studied how far the virus particles travel and shown it to be 6m? Righto. Sounds like your the one who seems to know better. But your in the police, oh course I should have known that.
The WHO is currently looking at revising it's distancing rules given this new evidence.
As for masks, yup there are not enough to go around, but if there were and we could all wear them when it then it would significantly lower transmission.
Who knows when this is over we may have up wear masks for a while when out in public places.
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