Depending on the age/fit-out of that AW109 helicopter it could cost between $1,900 to $3,500 USD / hour to operate commercially, the runway appears frozen while slowcoach backtracks in his $300 USD / hour Cessna along it, so why should the helicopter operator be punished if it can cross the runway safely - only takes a few seconds as opposed to minutes waiting for the slowcoach who caused the problem.
As mentioned before, better to always be safe than be right and in a burning hole, and I would not be surprised if ATC actually provided an expedited clearance for that helicopter's movement.