The poster is right that Sweden and Denmark are capitalist market economies with strong welfare states — not socialist — and this is a common confusion in US political debate. But calling the Soviet Union the definitive example of socialism skips over a real scholarly debate: democratic socialists distinguish their model from Soviet-style state communism. The 'every country fought to get out' line is rhetorical shorthand for the 1989-91 collapse of the Eastern Bloc, which is broadly accurate but glosses over varied histories. Overall it's a reasonable opinion piece on terminology, though it flattens the spectrum between Nordic social democracy and Soviet command economies.