It's true that's generally not inside the home, and for most people it's unlikely to be video footage stored off-site.
I'm not sure how I feel about this, we have one nest cam that covers our entrance hallway, and it's off while we're in the house. I like being able to see what's happened while we're away (oh look, the cat came in...) but the privacy aspect is a little worrying. I guess I could get a generic camera and stream to my NAS, using "motion" to detect motion and then back up to the cloud... but that's non-trivial.
If you mean "it might be listening! How do you know!" in the generic, fear-y sense then we can have that conversation about any network connected device you care to mention.
Agreed in that all devices are susceptible to 'listening' at any time without your direction or knowledge.
If I don't trust the "on when it says it is" feature, I should probably just get rid of it.
What is this fascination with recording everything at all times?
I'm not saying everything needs to always be recorded, but for security it is clear that it can lead to favourable outcomes for the party that wants the security.
At least thats why I have one. I had my house robbed a few years back, which was actually horrifying. Insurance covered all the valuables, but the stuff that hurts is what can't be replaced like things from loved ones who are gone. Also your sense of security gets tarnished after something like that. I still wake up in the middle of the night sure that I hear people moving/talking in my house. Having a camera (and dogs, and just giving myself time to wake up and think things through) helps bring me back down to earth in those moments.
I think my next house will be in the boondocks surrounded by forest with few to no neighbors.