

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.
And access to the Baltic Sea and to the Black Sea is worth, jack sht, if access to the Atlantic from there can be blocked by multiple countries. It is actually worse than access of Austria to the Seas. In the case of Austria goods can be delivered within the Single Market to an Atlantic port. The only access to the Oceans is at the Pacific but the Transsiberian Railway doesn’t have nearly the capacity to make that Russia’s main port and there is not that much of anything in the far east to need a huge port. It is good as a military harbour but terrible for projecting maritime power to Europe where Russia is engaged in imperialist wars of conquest.