Also a lot of people rent studios and one bedrooms or otherwise have open floor plans.
Not to mention I think the paranoia about these home assistant devices is overblown. Do you use a smartphone? In your intimate kitchen?? It has just as much capability to listen to you.
We have a saying that loosely translates to “If the barn burns down, so does the house”. The meaning is that it’s not really wise to let the house burn down if the barn is burning.