I think that you can control your defence so it should be a priority, whereas attack can be somewhat out of your hands.I wasn’t condoning throwing defence out the window in favour of attack, just saying you shouldn’t have the mindset that defence will win you the game.
You can’t win on a nill all draw, but you won’t be beat. You also can’t win on a 40 all draw, but it’s a lottery when points are coming from everywhere.
Points differential wins games. Focus on both but for me you prioritise what you can control.