I would agree. I think the real rule #4 is "Take greater care when presenting detailed or complex information. The presentation will often speak louder than the information."

For this one I dig into the linked articles because I think that the “law” itself is not exactly actionable. As a matter of fact it actually concentrated on logo design. The way I interpreted it for interface design is that if you need to present a lot of detail, you need to give it appropriate space. For example if you have a graph with many curves on it, people will be able to see the general trend but they will not be able to make out individual differences.