Works until you have young kids in school or daycare or other places where you drop them off without a cell phone. Then you really need to be able to pick them up when the caretakers or friends' parents call you up.
Yeah, 100% this. Deviant Ollam talks about something like this (though maybe a bit more high stakes (maybe not)) in his talk here about risk preparedness I found really interesting: https://www.youtube.com/watch?v=6ihrGNGesfI