Everything is theater if one is cynical enough. One can very obviously find value in blocking the camera, even if other sensors remain active.
That said, I do see merit to flagging these. Related surprises are usually e.g. speakers being possible to use as microphones, and accelerometer data being possible to use for location tracking in lieu of GPS / any kind of radio, just not remotely & live ofc.
What value is there in blocking a camera if the microphone isn’t blocked? No one can glean anything from the camera in my pocket or face down (or up) on table - they ca. glean a lot from the microphone