Oh, I totally get that and understand that. UO suffered the same problem. We need to be able to have some control over key assignment built into the game or something though. That way it is handled by the game.
Carpel tunnel and other serious injuries, such as mine, as a result of a year or so in UO with the very same problem, is very real and anything the dev team can do to help would be great.
I'm just trying to raise a concern for the players out there, so others don't suffer the same fate.
All this program did was simply reassign a key of my choosing, to simulate a left mouse click