In the game, blockading one port can collapse the entire national economy. The objection is that British trade would move through other ports, since Britain has many of them for its size. The absurdity becomes sharper when a single fifth-rate ship is enough to impose the supposed nationwide effect. The complaint points to the harder real-world problem of controlling a network of harbours, commerce, and alternative routes.
Notable Point · 28:34-29:07
Why a blockade should not close every British trade route
The game's one-port blockade rule prompts a comparison with Britain's dense network of alternative trading ports.