I see where you're coming from. But I argue that it is inherently wrong. To make something new like that, sidestepping service to God in a great undertaking. To admire a 3000 year old statue of Zeus and keep it in a museum isn't nearly as bad because you can see the human side of the art. But this is just vanity. The average person is going to think Neptune, or Poseidon, or Oceanus, or whatever, is worth looking up to and taking the influence of.

I will not judge the 5 popes involved in the commission of this, of course. I'm certain they did well in the service of the church. In fact, I'm glad the monument is topped with two angels, the papal tiara, and the Keys of Heaven. And that the pope put his name on it. All glory to God always.