You're constructing a straw man here. All your points are explained by the NWS themselves on the plot, and this is but one of the many products you can avail yo

You're constructing a straw man here. All your points are explained by the NWS themselves on the plot, and this is but one of the many products you can avail yourself of, along with the different wind speed probability plots, etc. As to why this particular one is shown by the media, I guess you have to ask them.