I never said forcibly.
I know in one case the residents delayed for a little while before accepting the recommendation to move.
In this case if the two do not move, then I would imagine Plan B would be to offer their neighbours the ability to relocate.
The common sense approach would be to be willing to move to reduce the risk for their neighbours.
I think there could be cases where the immediate health and safety of children or vulnerable people within the same household could require the removal of an infected person.