Because I see a vastly difference between Games and Applications. With Amithlon, you can't play the old games, unless you booted up UAE inside Amithlon. So WinUAE is the one to use when playing games. But with Amithlon...well, that's being used for resourcedemanding programs and development as I see it, not to play games. (simply said, WinUAE does the job better when it comes to games.)
So that's why I am suprised. .rom and .adf files containing games is not that serious software piracy in my eyes (and just like you I'm not justifying piracy) when it is games that you can not get hold of legally in any way. But pirating commercial software like Amithlon, StormC, Art Effect, Amiga Writer.. that kind of software, then it's true piracy.
Guess I thought the Amiga User Community to be more honest than it really is. :-(