Then maybe you should have spent some time looking before so strongly asserting something that is flat out wrong. Go look at some definitions. There are plenty of legal definitions, in addition to dictionary ones, that clearly contradict your take.
The key element is shared residency and living expenses. The number of homes owned is not relevant.
For fun, try https://www.prb.org/resources/what-is-a-household/ which says "A household is defined by the U.S. Census Bureau as all the people who occupy a single housing unit, regardless of their relationship to one another."
Did they get it wrong? https://www.census.gov/programs-surveys/cps/technical-docume... seems to agree with them.
Or, maybe, you are just trying to gaslight folks and not actually arguing in good faith...
Even if your 10 person household has 11 homes, 1 primary home where everyone sleeps 183 days a year and 10 vacation homes where each sleeps the other 182 days a year, that would still be counted as a 10 person household by the census.
And both those linked definition make clear the basic point that you are still apparently failing to grasp. The referrent of "household" is the people who share their primary residence, not the residence itself.
Consider standard household services. They are tied to the household, which has a fixed address. Is why power company won't give you power for your RV at any other location.
Again, I'm sympathetic. And power companies distinguish this with service address. But this is exactly the point. Every other "sharable thing" will be a distinguished thing that is shared. They will often have vague ass terms that tie it to the people of a household. But they will also have carve outs on how that applies to them.
Now, I will fully cede that Netflix has redefined their terms and are also at fault in this whole fiasco. They are the ones that tried to build on the back of goodwill by allowing a much more open sharing policy than anything else was ever capable of doing.