'Traditional Song' is vastly overshadowed by the volume of material out there proliferating beneath the folk music umbrella

True, but this too shall pass. 'Folk' as a style - usually meaning 'sounding a bit like Pentangle' - was ridiculously unfashionable 10 years ago, and it'll probably be ridiculously unfashionable again in 10 years' time. But traditional music was there, is there and will still be there. If more people believed that 'folk' ought to have something to do with traditional material, there'd be more chance that some of the thousands of people currently going through a 'folk' phase will get some exposure to traditional music along the way.