Earlier quoted context omitted.
I’m genuinely not sure how to say this without a little bit of snark, but do you…know how fashion works?
Sunglasses do seem to be taking the piss more than other items. An expensive pair of leather shoes can easily be justified by the cost of the materials, manual labor, build quality, and extended lifespan over cheaper options. While sunglasses seem to be a bit of injection moulded plastic with some lenses for a 20x markup.
If course, there are a lot of sunglasses that are not name brands and those a much cheaper.