So it is our bias that is informing your understanding. Ok. That happens to everyone. But this also helps others to understand your biases.
What is your bias? I know mine is the plethora of non-Halachic Kol Koreis, as well as the B&W uniform, which some claim to be Halachic but are not.
I’m surprised that you have a concern with my comment. You said “So some here decided that because he doesn’t see people wearing sun glasses, that there is an issur”. I agree with you (and DY) that those people are probably wrong, and it is cultural that the OP didn’t see anyone wearing sunglasses.