There is? Is it any meaningful percentage of households?
You could have a home wifi network which doesn't connect to the internet. Wifi routers are dirt cheap and don't need to be connected to the internet.
That said, the logistics of this would be super weird because smartphones are mostly designed to treat connected wifi as their internet source. Also, if your devices don't have at least an indirect internet connection you can't do anything remotely which is a pretty big functionality hole.
Here's some data that backs up my point. Sorry if this doesn't match your anecdotes from your bubbles.
https://www.pewresearch.org/internet/fact-sheet/mobile/
https://www.cnbc.com/2019/01/24/smartphones-72percent-of-peo...
https://www.comscore.com/ita/Public-Relations/Blog/Number-of...
While mobile internet may be becoming faster, it's still severely hindered by data caps and throttling.