I’ve never felt the need to use a VPN at home. I’m not really trying to hide from my own ISP, nor obfuscate where my connections come from.
I do host my own VPN from my home network though. This allows me to access my self-hosted services without exposing them directly to the internet, as well as keeps my mobile devices behind my pihole dns servers so they always receive dns adblocking and access to private dns records (self-hosted stuff). This also keeps mobile traffic a bit more secure from snooping, particularly on public/corporate wifi networks.
If the fan in your bedroom doesn’t work because it doesn’t have power, how does the bathroom fan work…