“We can argue about that of course but building huge structures requires a purpose - ceremonial or practical is what I was getting at”
There’s often little difference between saying something has a “ceremonial” purpose, and no purpose at all though. For example, the Colossus of Rhodes. It was dedicated to the “sun god”, so you could say it had a “ceremonial purpose”, but it wasn’t a temple, so there were no ceremonies performed there or anything like that. It was just, for all intents and purposes, a giant piece of public art, like our statue of Liberty.
For example the tragedies and comedies of ancient Greece started as pantomime to re-enact some mythological event and later became art for art's sake.
The word tragedy has its origin in the word for sacrificial goat and the comedy was important because the gods seem to be upset when humans were doing well and being prosperous so the comedy was designed to show the gods the people were really fumbling about so no need to smite them.