Don Pacifico scoring 5 more goals than you need to win one game and then scoring 2 more less than you need to win the next game shows a +4 goal difference, but only 3 points. The only statistical average that really matters is points per game. The goals scored column is meaningful, but it doesn't count for much unless you're tied on points.
What depth and balance across the front line give you are potential solutions in difficult games. That's how you convert losses into draws and draws into wins. Raw goals-scored doesn't actually say much about this, because it counts them all equally instead of weighting them by their contribution to points earned.
