"London Labour and London Poor"
Read it Dick, and his 'Characters' and 'Underworld', and E.P.THompson's 'Unknown Mayhew' - all remarkable classics and all on our shelves, constantly referred to.
I suggest if you want to know about the broadside trade you read Leslie Shepherd's 'The Broadside Ballad', or his 'History of Street Literature' or his biography of James Pitts, or Hindley's of Catnach... all well worth reading on the subject
Broadside writing was an Urban occupation; I have no doubt that some of the writers were proud of what they wrote, but they did it for pay.
What you are suggesting is equivalent to claiming that the workers at Cowley or Halewood did what they did because they loved cars.
Jim Carroll