"Brigadoonery"? "TCHD"? Who decides?

[BadenochWolf]

I realize that -despite the length of time spent lurking- I'm fairly new here. I'm having some trouble with what constitutes "traditional" casual highland attire. It seems a number of people here take exception to ghillie (pseudo-jacobean) shirts as manufactured history, yet a safari/fishing shirt and pith helmet as civilian casual dress is generally well regarded. Why is the former considered costumery, but the latter not? I am not trying to start a flame war; I own both outfits and see no reason to forego either, yet. I'm genuinely trying to understand why Outfit B is somehow preferable to Outfit A, when both seem to have jumped out of a romanticized (but not particularly accurate) glimpse of history.