It means you can stop caring about gender equality in Iceland, and start asking why your own country doesn't have the same.
And if your answer is "it's impossible", then you can care that Iceland is a counterexample.
And if your answer is "it's impossible", then you can care that Iceland is a counterexample.
The whole point is that it doesn't.
Humans aren't rational machines; they're sexist, racist, bigoted etc.
This result may indicate a betterment on some of these fronts.