It's the specific insight the author chose, not me. If we focus on the regression line characteristics then its fine viewed like this. But a title like "Supersonic Inefficiency: Why the Concorde was Decommissioned" along with a red dot for the Concorde is intended to focus your attention on how inefficient the Concorde is relative to the others. In regards to the main point the author intended to convey, the graph is misleading.