Advertising and targeting customers is integral to a business.
Treathyl Fox

Nail on the head. The same can be said about Alexa and Google Home. The idea being that queries to the device could be recorded rather than everything. Brings up all the privacy issues inherent in the Bates murder case in Arkansas where the prosecution is trying to demand recording from an Amazon Echo (And thus far being shot down). Smart TVs are not a dumb device. It’s a dumb implementation.