There have been fullbacks in the past that have taken that attitude.
When I was a boy our next door neighbor (Mick) was a mad rugby league fan who regularly attended matches from the mid 1930s to the mid 1980s. He was a mine of information about the history of the game.
He told me he was at the SCG to watch a match between Souths v Canterbury, when one of Canterbury's big front row forwards burst through the line and charged downfield.
Clive Churchill stepped aside and let him score. Mick reckons that when Churchill was quizzed by the press about it after the match, Churchill said that it wasn't his job to tackle prop forwards.