It is now 2022 and this maddening issue with the of the injury/fatigue system has still not been fixed.
I'm not complaining about the wounding system as it works now; I'm not even complaining about the character moaning and groaning when overloaded and fatigued. I'm only complaining about the sound itself not being an option that can be turned on or off.
This constant moaning and groaning happen continually during the whole playing session. When you've been killed and re-spawn, or re-start from a previous save, the character still keeps moaning and groaning constantly even when not injured, not overloaded and even not moving ! and after a few hours of been continually subjected to it, it becomes a nuisance to the point that one wants to quit playing the game.
Ideally, the way the sound works should be entirely redone. This should not be a constantly playing loop , but should be connected to what the player is doing (not random, but connected to some action that is aggravating the wound, like changing stance or when moving while injured).