Having worked at large companies before, I'm almost certain that more than one person working on the product raised the point "this has a microphone, why isn't it documented?" or "this has privacy implications", but was silenced.
(Or it could be that everyone working at Google has been carefully chosen to not have such concerns; I do get that feeling sometimes too.)
(Or it could be that everyone working at Google has been carefully chosen to not have such concerns; I do get that feeling sometimes too.)