It is way less dumb than you think it is. As long as climate change is not doing something about it, Russia’s access to international waters is a lot more compromised than many think. Russia’s main ports have access to the Baltic Sea and the Black Sea. In both cases other countries can block access of Russian ships to the Atlantic. Other than that, the only ports with all year round usable access to international waters is in Russia’s far east (Vladivostok primarily), which can compensate a bit but not nearly replace the ports in the European parts of Russia.
It is way less dumb than you think it is. As long as climate change is not doing something about it, Russia’s access to international waters is a lot more compromised than many think. Russia’s main ports have access to the Baltic Sea and the Black Sea. In both cases other countries can block access of Russian ships to the Atlantic. Other than that, the only ports with all year round usable access to international waters is in Russia’s far east (Vladivostok primarily), which can compensate a bit but not nearly replace the ports in the European parts of Russia.