If inornate churches that look more like strip malls and expo centers are so much better for the laity then imagine how much more good it would do for the top brass, relieving them of the burden of having to look at all that sacred art all day long. What's good for the goose is good for the gander.
Of course it only adds to the decline when the hierarchy builds as if going to Mass is no different from a trip to the mall or seeing a show.
There’s also the hypothesis that if the Church gets prestigious awards for their avant-garde architecture people will finally start liking the Church again.
The only thing funnier than witnessing a Catholic mass while having no idea of what it's like beforehand is the idea that some people still fervently argue for the masses to be exclusively in Latin. Because if there's one thing better than medieval LARPing, it's medieval LARPing in a dead language.