> United States and North Korea agree on nuclear physics: they use the exactly same number for cross section. They don't agree much on humanist issues.

This is true but concluding that therefore there's "not much to learn" seems like the worst possible way of resolving this conflict.

"humanist issues" are about the management (not the solution) of unsolvable disagreements. The knowledge is different in nature from scientific knowledge but for no reason should it be considered inferior. By thinking this way you just exclude yourself from any discourse and just hinder your condition.