Disagreement over different skills worth relative to one another, disagreement over what plans to execute as a team etc. dissembles the individual skills' value compared with gold.
People who can't agree where to put a bridge, what crops to plant, or whether or not to go to war will all want gold. The consensus about gold's value is a stronger component of gold's worth than its actual intrinsic value is.
Imagine there's a person with a drill for wells and a person with a material amount of gold. If each walks into a town where people are dehydrated, the people of the town will hopefully be more excited to see the drill person than the gold person.
If they each walk into 5 random towns, however, one would imagine the gold guy would have a more positive reception on average, because gold's beauty is independent of people's circumstances or culture, whereas the value of a well is very contingent on whether or not people want a new source of water. Historical royalty who did not want for anything were always happy to see more gold. Precious metals are one solution of the age old conundrum: "What gift do you get for the man who has everything?"
This relatively inelastic desirability makes gold valuable for trade. As a proxy for human energy and people's resources, gold can solve many different problems that a drill cannot.