Camber to a certain degree increases handling, imagine your tires biting into pavement sideways, if they were cambered into the pavement they would grip considerably more. Consider it like an embankment on an off ramp.
Back in the days this 'aggressive' look got adopted by the drift scene to lower traction but still have that mean look and 'JDM angle.'
From there it exploded and is being portrayed at an over exaggerated sense like anything nowadays. Big wheels, big camber, big wings, big dudes.