When a person hires a personal assistant, the person doesn't generally turn around and accuse the assistant of spying on them because the assistant listens too attentively.
There's no way I'm getting a digital personal assistant like Google Home or Amazon Alexa. It's a novelty that trades privacy for a little convenience, and I'm not that lazy.
(... in fact, I tend to think about it in just the opposite way: if I'm ever murdered in my home, I want the cops to be able to subpoena Google to get evidence on who the killer was. It's nice to have a system watching my back all the time).