One: See above.

Two: The very fact that you can say:

modern moral standards say it's fine to let 1.5 million children a year die of diarrhea because they happen to be born in a wrong country.

...and expect me to draw your implied conclusion refutes the very claim itself. What do you think makes me appalled that children are dying of diarrhea, aesthetics? That we haven't yet fixed a problem doesn't prove that it meets our approval - after all, people still die everywhere.