Mostly it's because this board has more 4WD owners than 2WD owners. 4WD vehicles in general are designed to be driven off-road, which many members of this board do.

Your's however could not be driven off road without damaging the wheels and tires severely, and suffering the world's harshest ride.

Many of the 4WD owners on this board think it is sacrilege to take a 4WD Xterra and make it into a street only vehicle.