Sharp described as "The twentieth century collector is a hundred years too late." The reason was that many of the songs he was collecting were not the originals, but the garbled singalong versions peddled by the broadside sellers of the nineteenth century."

I would like to know why what that proces is deemed as NOT part of the folk process?

I recognise it is different to what may have happened for perhaps several centuries before but why is it not part of the folk process?
PS I dont believe that the folk process is just oral tramsmission