I have Google Home and monitors on my own network, I’ve never seen suspicious activity. Here’s somebody else doing it:

https://labs.sogeti.com/google-home-spying/

So the only piece of evidence is a single mention on a low quality PowerPoint presentation from a company nobody has ever heard of. This is tinfoil hat territory

Neither of those articles has any evidence of them secretly listening through everybody’s microphone

Stories of these companies listening through everybody’s mics are like modern day ghost stories. It definitely totally happens every single day but nobody ever manages to get a piece of hard evidence. Maybe the algorithms can sense wireshark like ghosts sense cameras