Cultural psychology is the field that investigates this. By investigating phenomenon in multiple cultures, you get a better idea of what the actual phenomenon you are investigating is, and what is a byproduct of culture. It's not a perfect, obviously, since we are all as much a product of our culture as anything else.

In any case, just because we the tools we have are still in their infancy, that doesn't somehow implies that A) they are utterly useless for anything at all, or B) that every culture everywhere is a perfect realization of a human conception of life, each one exactly equal of any other and none of them at all with any growing up to do.

It's just silly all around.