Deletion of Piano rock (2nd nomination)

Comment: Several issues. The existence of a piano score book does NOT confirm a genre exists, there might well be a book "Classic Rock for Dobro" but it doesn't mean the song was recorded with a dobro. Nor does calling Elton John a piano player create the genre. The omission of some very significant piano-players confirms that this is . Grabbing artists together because they employ a keyboard player is  not illuminating, not significant or encyclopedic. What could be encyclopedic is the development of piano in rock music. There's plenty of references for that
Stance: delete
Cited policy: Wikipedia:No original research (WP:OR)