I think rule of 6 is just to give the police legal powers to do something when people break the rules.
People say they don't want to live in a Nanny State, but as soon as they need to make good decisions for themselves, they fail, and the state needs to tell them what they can't and can do. Silly really.
Biggest problem is all the idiots who still think that it is just a scam made up by governments to control people. They're out there spreading it and killing people. If the police had powers to lock them up in isolation for 6 months that would help a lot too!