That seems like a more specific version of Postel’s law/the robustness principle: “be conservative in what you do, be liberal in what you accept from others"

That seems like a more specific version of Postel’s law/the robustness principle: “be conservative in what you do, be liberal in what you accept from others" https://en.m.wikipedia.org/wiki/Robustness_principle https://en.m.wikipedia.org/wiki/Robustness_principle