LOL, I bet, who wants to hear that awful noise?? Listening to me breath through a snorkel is incredibly irritating. Sony Action cams have great stereo mics for terrestrial use, but underwater it’s useless ...Yuneec's UAV called the Q500 had a external microphone that you could activate or not. I can tell you after your first video with it on you will never turn it back on again. Trust me I been there done it.
If listening to props at a very high rate of speed is your thing then maybe but it was not my idea of a great video.