I think one problem is, almost all security cameras are sold with audio these days. If the cameras have a mic, telling people "Oh, we turned the mic off in each camera" or "We don't record the audio" isn't very helpful.
I saw them advertised "With microphone" or something recently, which led me to assume that was a 'feature' of this model...but you know advertising
But yes I've done this with all my ring cameras, they were still the old type. One of them was a bitch to open up though (the indoor one IIRC)