The point is to hit people with jaw-dropping opulence to get them into a frame of mind where they are small and they are dealing with something large. It is easier to convince them to do things they would not ordinarily do, and it makes them much more likely to see their host as important and able to provide unforeseeable opportunities.
Showing off is fun, but billionaires are canny and strategic people or they don't get to stay as billionaires. There are probably a few layers of thinking beyond being crass when pictures of their homes are pushed out into the public sphere.
In fact, I'd say that much 18th century baroque is too human scale: when you zoom out all the tiny ornaments blur together. I was immediately impressed by Saint Peter's basilica in the Vatican when I entered it for being a baroque building that defied this problem: the massive columns balance the small details and keep it interesting at all scales.
Trump is another matter of course.
Under Fussell’s analysis Trump’s displayed taste in decor and clothes are about as Middle as could be, thought not a small amount of Fussell’s Proles’ taste creeps in in his clothes and food. Imitating the baroque and “living large” while wearing expensive clothes that don’t fit is what one might expect from a high-dollar lottery winner who used to hold some middle position at a bank branch.
Coating your cities in a large cloth of meaningful idea is art that lives and effects the world. Dead art ends up in museums. The symbols and ideas put into these buildings will be a beacon for thinking about the future and what the shape of the world will be. You will feel new feelings in these forms and find a different place to install a hierarchy of competence around a central idea.
Building a maxamilist tower around citigroup or the avengers creates a tree of floors that can be imbued with productive action around that idea, company and collective set of people.
Reducing architecture to showing off is hot right now and misses most of architecture's effect on a human.
No this is not true. Once you are billionaire you get so much interest its rather difficult to not stay one.
I totally agree that the projection of wealth is not always sign of weakness, but lets not kid ourselves about the economics.
Trump’s aesthetic is if you pumped tens, if not hundreds of millions into one of those structures.