Lets flip this statement around:
"While the National Weather Service warnings are a boon to the public at large, they are not suited to the requirements of specific businesses."
AccuWx is a business, thus they are suited to the requrements of specific businesses. They are not suited to the public at large simply because their services are not designed or priced for the public. Unfortunately the number of the pubic is 10^x fold greater than the number of "specific businesses".But who really needs the services? The public, and that's where the NWS comes in, and why they are so crucial.