it's not signaling. beauty is not "signaling", especially when it affects us to the extent that architecture does. unless you want to argue that what is all around you has no effect?
You are under the impression that beauty is some sort of objective thing, independent of what you were taught and what's in your culture. It's not. It's deeply embedded in culture, and is part of human power dynamics.
when did i ever allude to beauty being objective? please don't put words in my mouth.
Well, you didn't even present any evidence for your negative claim, so I had to guess what you were thinking.