Me and my partner share locations. Never once have we done this. It’s purely a logistical thing. 10x faster to check someone’s location when you’re supposed to meet them instead of testing them “wya”.

Or, we could fill him with hamburgers until he explodes

This is absolutely a problem, but credit where credit’s due, I’m really happy that the specification for Matter requires local control without calling out to the internet. Though Matter devices can still call out to the internet for additional features. I know Matter has it’s issues, but I believe it is slowly improving the smart home. But I fully understand people that want to reject the smart home altogether.