I disagree with that last characterization. I think the ethnocentrism only applies if there is an example to which that observation applies less than to the reference example.

Because that was my original question, if you go back to that: which system is the cartoon supposed to depict?

Because if the answer is “all of them”, then there is no way to define a gradient that we want to be moving towards. The movement is going to be relative to a starting point. So I don’t feel I have a onus to prove that there is a system to which the (very generic and simplistic) observation doesn’t apply. My point stands if it doesn’t apply to all systems equally or to the same degree.