i can tell you know little about visual art (as is evidenced by your cherry picking pieces of the airport murals to coalesce and fit a preconceived idea about NWOs)
There aren't any other $5.2 billion projects with that style of art. That isn't cherry picking. It is probabilistic analysis of who is capable of what.
I imagine the cost adjustment on the The Sistine Chapel was that or higher and Michelangelo still managed to put his own spin in that work with a church (who had set the themes and had the power of public execution working in their favor) watching his every brush stroke-- so yeah artist are still smarter (at least when it comes to their art) than the people who think they are lording over them. But that's all theater; your analysis of the work is what's under question. And when i say cherry picking, I mean you are cherry picking images out of the larger work to fit a theory that the overall work doesn't correspond to (at least not in a very convincing way).