Why do game developers shy away form the notorious B button to be used as the default trigger button? Ok, think about it. Would it just be nice to have a shooter game that uses the B button as the trigger button? Or at least give you the option to set up the controller functions like you want it? Then controller support such as the Wii Light Gun and Wii Blaster will be more useful.
"It'll teach children to shoot their fathers guns more accurately." Geez I really hope that's not why this is the reason.