Household bubble problems

[Cherryghost]

It's been suggested the govt is looking at a household mixing with one other household in time but they have to pick each other exclusively.

E.g house A picks house B but house B can't pick house C to mix with.

This will cause so many problems and difficult decisions for many. Which grandparent side will you pick?
Do you pick your mum or your partner who doesn't live with you?
What about children with separated parents will the other parent be their bubble? I can see this causing so many arguments especially with blended families if only allowed to mix with 1 other family.

It's heartbreaking that people will have to pick but there isn't really any other options.
What other options would people propose?