@primabloodydonna
There's just no logic to it. Let's meet in a group of six but if a seventh person joins it suddenly becomes incredibly dangerous.
Just tell people to use their common sense and limit their household interactions. But oh no, that would be much too sensible wouldn't it.
In any case, it will delight all the curtain twitchers who will jump for joy if they see a gathering of 7 people and phone the police.
Well, it is sensible to have a specific number, isn't it?
Wherever there is a borderline, there will seem to be a problem - to an extent, the number of 6 in the guidelines that are becoming law is arbitrary - it could be 5, or 7 - but some specific number is needed for clarity.
It happens to be 6. That's life. It's not 0, or 2, and sensibly it's not 10 or 20.