Not even the most responsible companies (e.g. Google) can hold out 100% of the time in the face of determined assault by government. Some of that data is going to leak to three-letter agencies, or similar.
Somewhat less responsible companies (e.g. Amazon) will leak data more often, to a wider range of threat agents.
So then we have to consider how valuable this data is. Random sampling of private conversations within the home? Sometimes innocuous -- but if the wrong moment gets leaked, the consequences are potentially life-shattering.