Normally I'd disagree about bringing religion into things, but here it makes sense from what I've seen as with the loss of a faithful populace buildings as a whole don't seem to try and be impressive, like, faithful peoples gave us Notre Dame, the Hagia Sophia, the Colossus of Rhodes, the Statue of Zeus, the Great Pyramids of Giza and so on, while increasingly faithless ones gave us this. Now, unless there is some other reason that I am missing like a sudden change in priorities when designing buildings or just cultural and technical knowledge mingling diluting the uniqueness of buildings.
Makes me kind of sad tbh, seeing that most of our greatest architectural endeavours for the past few years have just been skyscrapers or giant names in the Arabian sands. Though, that might mean we do buildings better when they're to honour something rather than show off the economic capacity of a single individual.