I think that's not true if Russia succeeds in subjugating Ukraine within the next decade or two. Russia might then be isolated from NATO countries, but there are a lot of countries that aren't in NATO and that want to buy what Russia sells. Russia is primarily an oil and gas company nowadays. If Russia succeeds in subjugating Ukraine, Russia will probably become an industrial agriculture business too. Oil, gas and food will usually trump political concerns, especially when those councerns are about countries unconnected (in either geographical, social or political terms) to your own and there's no threat to your own. India, for example. It's not under threat from Russia and it's not connected to Ukraine in any way. It's government will hedge a bit while the invasion is in progress, but will continue to buy oil and gas from Russia even then. Or China, whose government doesn't even pretend to care. Two massive countries that account for more than a third of the world (in terms of population) and that will buy what Russia's selling. That's very far from being "isolated from the world". They might hedge a bit in public for the benefit of their own businesses selling to NATO countries, especially their own agriculture businesses (which would then be in a much better position for selling to NATO countries, with Ukraine being removed) but they'll buy what Russia sells.
And I most certainly agree that the enforced road to globalisation some insist we pursue is madness, economically, socially and ecologically.
