It's actually not just a technicality. National Socialists really were socialists - not only in name. They apparently took the 'Nationalism' more seriously than the 'Socialism', but they were, nonetheless, actual socialists.
For example, in Hitler's Germany, all German citizens were guaranteed a job by the government. All German citizens were entitled to an education at government expense. Healthcare was not totally socialized, but was heavily subsidized by the government. Etc., etc., etc. Sounds reasonably socialist to me.
I agree with you, but on the other hand, that also makes folks like Henry Ford socialist.
Back in the 20s, Ford's workers also enjoyed many of the things commonly associated with socialism: Free daycare, subsidised housing, free medical care, recreation & sports complexes, etc.
And he was quite fond of the Nazis, and they were equally impressed by him - Goebbels translated Ford's antisemetic newspaper & used chunks of it in his speeches, verbatim

I guess the man who epitomises capitalist industrialism is a closet socialist

I was not implying any kind of value judgement at all - just relating historical fact.