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Yeah, there are different bluetooth audio profiles, one for high quality audio intended for media consumption, and one for bi-directional audio intended for telephony (and some others, but these are the relevant ones here). The “gotcha” is that in general, any attempt to consume the mic feed from a bluetooth headset will switch it to the telephony mode, so if you have them paired to a PC and an application is listening to the mic for any purpose you get stuck with much lower quality 64kbps PCM audio.
Land usage is also a huge concern with hydro power. Pumped hydro storage means permanently flooding an area to create the reservoir, which carries many above and beyond just the destruction of whatever was there before. The flooded land has vegetation on it, which is now decaying under water. This can release all sorts of unpleasantness, most notably mercury.