Age old story of all choke points of course. I was taught about choke points by a family member that served in WWII and it's funny, thinking back I was in trouble because I could not find the Strait of Hormuz on a world globe that had no writing on it. I mean seriously ... who keeps such a globe just sitting around for such an obscure moment? That lesson stuck with me. It was a strange lesson but it stuck nonetheless.
Was just reading that this is the first time a waterway choke point (other than canals which are man made) has had a toll. The implications are intriguing for their novelty and unknown second order effects.
Also, the comment about the globe reminds me of a quip from The Daily Show that went something like "... something something War, or how Americans learn geography." You are lucky to have prior generations which provide such inter-generational teaching moments.