Arrogant? Maybe. But it's the exact thing every country in the world has been doing ever since there was a such thing as nations and diplomacy. I think it's naive to think that anybody really cares about some objective notion of fairness.

As for their help, whether or not they want to help has never mattered. They will continue to either help or not help (or impede) for the same reasons they always have - whether it's in their own national interest to do so.