What is hacking?
Hacking is manipulating code to do things it was not really designed to do.
The XIM does nothing of the kind, it cannot do anything a controller cannot do, it merely acts as a giant joystick which gives a huge amount of control for both large and small movements.
The mouse cannot aim faster or more precisely than a controller on a console, it is the human's ability to control the mouse which makes it more accurate, not the actual hardware.
In REAL LIFE, changing the steering wheel on a car will not make the car go faster or perform better, however it may make the driver more comfortable, so allow them to push a bit harder to get a faster lap time.