The flight manual shows flight parameters that if they are exceeded, we risk the chance of damaging the equipment or in this case losing control of the helicopter. The reason that most US designed helicopters have a critical wind azimuth area from the right side is because under certain conditions of DA, weight and wind, directional control WILL be lost no matter what the pilot does. It is a design limitation of the tail rotor.
LTE is a pilot technique issue, or should we say a bad technique. The manufacturer tested the machine and tells you how much x-wind it can handle. They cannot predict when control will be lost if the pilot doesn't keep the yaw rate under control when experiencing M/R vortex interference, T/R vortex ring or weathervane effects.