There are eras he straight up was not just a guy from Kansas. He was pretty much the space man who vacationed there as a baby. He viewed himself as Kryptonian primarily and while he loved his human parents, he was an alien.
Yes, the golden age is extremely important to Clark, Pa and hell, superhero comics in general. Nobody is refuting that. But to refute the next 70 years of publishing history is equally foolish. The characters have evolved over time.
Furthermore, you can't demand people cast their notions of Clark aside while asserting your own about how the first ten years matter enough to "is, was, and always will be" (and you're doing that a lot as if you're the authority on a character you're asking people not act as if they're authorities on) as if it's the truest incarnation of a character that is owned by a corporate entity. That's certainly the truest incarnation for his creators, or is it?
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Perhaps people refine their ideas over time. I would argue that Superman isn't a utilitarian and neither should the Kents be. Snyder did, and I hated his take on the character. So that's my bias. Some love Man of Steel and good for them, I'm glad they can enjoy it. Both I and they are entitled to their opinions.
I actually quite enjoy a golden age Superman. He worked very well for that era, and some aspects I really wish would come back into play. It isn't my bible for Superman, however. Just one of many eras in his wonderful history.