For an example of fully rampant Typical Mind Fallacy in Urbit, see the security document. About two-thirds of the way down, you can actually see Yarvin transform into Moldbug and start pontificating on how humans communicating on a network should work, and never mind the observable evidence of how they actually have behaved whenever each of the conditions he describes have obtained.

The very first thing people will do with the Urbit system is try to mess with its assumptions, in ways that its creators literally could not foresee (due to Typical Mind Fallacy), though they might have been reasonably expected to (given the real world as data).