We're also not great at scaling trust.
"We the people of Rojava in Northern Syria: Kurds, Arabs, Assyrians, Turkmens, Armenians, Chechens, Circassians, among them Muslims, Christians, Yazidis and various other creeds and sects, declare that the nationalist State has placed Kurdistan, Mesopotamia and Syria at the heart of the chaos that is afflicting the Middle East and has brought acute crises and suffering upon the people. ... The Democratic Federation of Northern Syria is founded on a geographical concept"
(https://www.scribd.com/document/441234886/Social-Contract-of...)
And yes, trust doesn't really scale well, which is why centralized governance in general is a big problem. But there are known techniques to decentralize it in ways that can still scale, e.g. council democracy.