I just found out that it must be very easy to setup fully local voice recognition assistant that might be used through MakerApi to control Hubitat devices with Whisper.cpp. I have not tried anything yet but i will soon. whisper.cpp/README.md at master · ggerganov/whisper.cpp · GitHub
This will solve one big issue with Alexa/Google voice command that go to the cloud. Using your own local voice recognition stack that is easy to setup and also lightweight to run will not allow your voice recording to leave your local network