Why The Full Sheet Music Isn't Given

People write to me asking why the full song isn't included. Take the song below for example ! It's the first verse of ''I'm A Rover Seldom Sober'' . The notes used in this first verse will be the same as the notes used in the other verses of the song, so there's no need to keep writing out the same notes over and over.

If a song uses different notes for the chorus, then I'll include them. This has been the norm used in songbooks for yonks, and it works.