@0xYYZ
Do note that not every player is super competitive.
Bluetooth headsets can be quite easy to use, especially on console platforms where BT headsets are typically more liked due to the fact that you either have to link your headset to the console or the controller itself.
For casual gamers the audio should work fine, every game should be able to properly support BT headsets without any issues at all.
Of course these headsets can encounter some issues themselves due to interference and so on, which is a pretty normal thing... though this doesn't mean that games shouldn't support them.
Don't think it's stupid for them to complain as these audio issues could still be related to the client itself, though with audio issues it's always hard to figure out the cause.
That's why with issues like these it's better to check with wired headsets to eliminate the chance of there being issues with the BT connection which would be causing the audio issues in that case.
Doesn't mean that people with BT headsets can't get these in-game audio issues, so I think it's completely fair for them to complain if there is something wrong with the game itself.