The problem is that we have not been taught how to weigh different ideas' merits and demerits. The scale is compassion with respect to how acting upon an idea affects human beings and the Earth, Herself.

Money is a tool for trade, but what is being sold and what is being bought?

A hammer can be used to build someone a house or bonk an innocent person on the head.

Seen through the lens of compassion, the good and the bad become obvious in all but the most extreme corner cases.

You're correct. But I would argue there are more areas of agreement than you might think. Areas of disagreement are more emotionally salient, and tend to receive more attention. See this essay https://slatestarcodex.com/2014/12/17/the-toxoplasma-of-rage... or this video https://www.youtube.com/watch?v=rE3j_RHkqJc

The world could use a few less people quarreling about their conflicting ideas, and a few more people seeking the intersection of what everyone thinks is good, and working in it.