As well as a vast number of beautiful art, cathedrals, celebrations, and culture. You don't have to be religious to appreciate the beautiful literature found within the Book of Myths I call the Bible.
Yet, I find boatloads of very well-written literature elsewhere, far better than the bible. The bible is an interesting read into the minds of medieval men, but that's pretty much it.
It's emotional. Without any worship or religiosity about it, it isn't there. So it's basically to amplify it.
Nonsense, one can follow a guidebook with getting emotional.
Maybe build massive Human statues and shrines to the Human species, etc
I don't see any point in that. There are far more worthwhile endeavors than worshiping idols.