> it also says that the data wouldn't be used to "advertise to you or sell you anything" which is not the case with Smart Speakers

1. Google's entire business model is advertising through collecting more complete user data.

2. Why would they collect this data if not to further their advertisement business?

3. I've never heard of companies collecting data that wouldn't further their business pursuits.

This data is either "digital-oil" or "digital uranium" both still extremely valuable.