How we organize ancient testimonies and stories and relate it to our worldview is really our main concern.Except, to repeat again; testimonies and stories are completely irrelevant to your anachronistic claim here because no primary sources stated what people of Gu Chaoxian spoke, much less their "national" identity. Whereas primary pre-Han texts gives us all the evidence that this kingdom originated west of the Liao river. Accepting that Gu Chaoxian is "Korean" is a Ming era construct, and far from contemporary "testimonies" and "stories".
No, its because we have actual primary sources to examine, whereas you have nothing but a later historical construct to draw your evidence. A person who is not trained in history clearly can't use the proper methodologies and have the naive arrogance to denounce others who has.
Look at the way this forum is organized for example. Asian history, European history, American history. There is room for a Korean history which Gojoseon belongs to.
You're just being irrational and talking nonsense in order to to mislead or deceive.