I agree that many pleasure boaters and small boat fishermen, and small commercial boaters do learn something very similar to that right away pyramid. It’s sometimes called the “gross tonnage rule” and it’s actually quite practical. Simply put, its stay out of the way of large, less manouverable, commercial vessels that have work to do. This is a specie of the “rule of special circumstances.”
As I recall, 50 years ago, the Rules provided that fishing vessels and sailing vessels have the right of way (as they do now), but the Rules did not have the current exceptions that fishing boats and sailboat must avoid impeding larger vessels in narrow channels. That rule change came about because too many fishermen and sailors learned the Rule that they have the right of way, and they started to insist on claiming that right of way in an impractical way that posed a hazard to large vessels.
If it were not for sailboats, fishing boats, and very small commercial vessels obstructing the passage of large commercial vessels, I wonder if Traffic Separation Schemes would have been developed.
The “Gross Tonnage Rule” makes a lot of sense. And it is valuable for large commercial mariners to consider that its what approaching small vessels may be thinking.