Are you implying that the total number of infections is held constant somehow, and restrictions merely move them around? Because that's false. Restrictions work.

Statistics show a different reality but even then, if everything outside the house is closed it stands to reason that the percentage of infections inside the house would grow by a lot. Simply because there are no others. And it turns out to be pretty tempting, once infections start rising again (despite the restrictions) to use these percentages to impose even more draconian restrictions.