Google’s “Home” devices are openly accessible on the local subnet. Some basic functions can read and written. The information extracted from them could be interesting in the hands of an intruder.
The tools to monitor your calls are already built into your wireless router, and whoever has access to it can breach your privacy.
Bettercap 2.7.0 is the latest release of the network attacks and monitoring tool. It is an alternative to Ettercap. My attempts to poison the ARP cache of my testing machines first failed, until I found out why.