Your rejoinder suggests you’re reading this article as Catholic triumphantalism, rather than something in which Protestants can share. The telling thing about that Mormon temple is that non-Mormons aren’t allowed to see inside it.
Stirring a desire for that which is higher is always beneficial for leading people to God, especially if it praises God, unless it presents an anti-Christ, such as government or commerce.
I'm just putting the idea of converting people by impressing them with fancy buildings, in perspective.