Hmm, I see what you are saying, but I don't think most opera-dress-up items are pretending to be highly functional. They have transformed long time ago into purely aesthetic.
To go back to my car analogy comfort zone ;), I don't like 22" rims personally (16" tires are so much cheaper:); but they don't bother me. There's no pretense at functionality, some people just think it looks cool, awesome. Some people think ties look cool, awesome. It's not a "fake" 22" rim, it's not a "fake" tie.
But a non-functional hood scoop, and non-functional shutter, strike me as "fake" in way that other fashion/aesthetic items do not. A hood scoop hugely implies that it's shunting air somewhere important. A shutter hugely implies that you can open or close it, brighten or darken the room. They have not yet transformed far enough from their functional origins. Whereas a modern tie doesn't hugely imply anything functional that I or anybody few generations around me have any cognizance of. Heck, I'm from Croatia, and I have to Google every time what Kravat was actually used for - I honest to gawd cannot even think right now what Tie could have been functionally used for.
Maybe a hundred years from now, when hydrogen and electric cars are all anybody ever remembers, hood scoops will be seen as purely an aesthetic choice; and maybe to people from different climates shutters already seem a purely aesthetic choice. To me, today here now, fixed, wrongly-proportioned ones don't evoke either "pretty" or "ugly", they evoke "cheap ridiculous fake".
My 100 Croatian Lipa :->