But doesn't that require us all to agree that life is provably better for people in developed countries? We have the highest rate of anti-depressent usage in the world, and also happen to be the richest nation in the world. I reject the concept that simply being born into a wealthier country or wealthier family automatically means your life is going to be "better" than someone who was born poor.
I think this thread was really about opportunity. The original comment was about whether people's opportunities for success were based more on "luck" or their hard work. "Better" is a lot like "fair", who is to say? People would be exchanging one set of problems for another to go from poor/undeveloped to rich/developed.