100% agree... The problem is the Google hardware is very locked down. I think someone managed to get one model to accept some injected commands at boot, but no one has been able to build custom firmware or store custom Configs or data into them yet afaik.
My Google Home Mini is still mounted to my ceiling, but power has been off since the news that Google was storing way more recordings than they said (years ago now). I'd love to boot it back up and use it even if just as a speaker. But I'm very hesitant to use it with Google's software anymore.