Because it is assumed that with the 242 the vehicle will spend much of its time operating in full-time mode.
For 2WD, the front is sually set for a small amount of toe-in not because they want the tires to run that way, but because when the rear axle pushes the front tires down the road, any slop in tie rod ends, etc, gets taken out and the actual running condition is zero toe. In the old days, the shop I used to go to put a spring-loaded spreader bar between the front tires and then set the toe to zero with the tires forced apart, to simulate the dynamic condition.
In 4WD, the front tires are not being pushed by the back, they are pulling the vehicle forward. Thus, they won't be pushed back to take slack out of the various components and they won't self-correct from nominal toe-in to dynamic zero toe. So they get set to zero.
