Why is the range of roof pitches for CRV ridge vent limited to max 5/12?

The CRV ridge vent was not designed to meet the demands of a high-pitch roof's geometry and wind speed. 

The airflow speed and direction on a low-pitch roof is often very different from that of a high pitch roof. The CRV ridge vent was not designed to meet the demands of a high-pitch roof's geometry and wind speed.