You're very honourable and all, but not making much sense. As long as goal diff. matters, teams will run up the score. These women have worked for the past four years (or thier whole lives) to make it to this point, and as long as scoring lots of goals has a potential impact on their chance to win, they're gonna take it.
The other side of the coin is that they need to work hard every game to get better and better so that they peak by the time they hit the finals. Playing Italy isn't very good for practice, so they've gotta work hard the whole time. If you'd notice, they scored their goals as a team, not selfish individual plays. They could have probably scored alot more, but they're trying to work on their team work. And if that results in goals scored and you getting pissed off, well, i'm sure they don't really care what you think.