yes, it did work out for russia. did you not see how half the world attempted to pressure russia into withdrawing from the war by economically starving them? last i checked the war is still ongoing. when is their economy going to collapse again? two weeks? north korea is somewhat okay, even if they don't have much else due to being too small with too few local resources.    the only things that matter are the betterment of your people and the strengthening of your nation. relying on foreign goods undermines both. they take jobs, and with it, wages, away from your citizens and give them to foreigners, and foreign trade that relies on international relations which can change, across long distance routes that can be cut off.  if a nation cannot survive if it is cut off from the international world, it is a failure as a nation that has betrayed its people.
United States