I own 4 Home Minis, 1 Home and 2 Home hubs I honestly don't care so long as my data is used to improve the functionality and stability of my investment. It is quite another thing if they are selling my conversations to third-party vendors.
1. If the company has recordings, governments can hoover them up. And once one govt agency has them, sometimes other agencies get access.
2. Sounds like you're okay with Google using your private communication to enhance its products. So they can target you with ads based on your conversations with your spouse, children, or colleagues.
3. I just hope the algorithms understand context:
Your spouse: son, put down the gun and come to dinner. [jokingly] Oh no, don't shoot! Argh you killed me, now eat your peas.
You: we're going to kill it this quarter. They'll never know what hit them.
TV in background: "kept their body chained in a basement. That and more at 11"
Only if the government subpoenas your data individually.
Also, the recorded data in this case is stripped of PII, meaning it's not linked to you. If you're still worried because you told Google your social security number, you can review what is stored, opt-out, and even mass delete the recordings at myactivity.google.com.
> The man, who wants to remain anonymous, works for an international company hired by Google. His job is to listen to the audio clips and to write out what he hears, so that Google can improve the speech assistant.
So,
> It is quite another thing if they are selling my conversations to third-party vendors.
The concern remains the same though: Making user data available to a non-Google entity.
Do you care if Google makes money off of that trade? Really, they get value one way or another, because the analysis is incorporated back into the product.