Because mentally diseased sadistic, psychopathic and sociopathic, malignant narcissists require the world to conform to their delusions of grandeur, and our entire society is built around worshipping them.

Capitalism is their theology.

In the old days, they just made up, or had scribes make up religions, take what was floating around the society, and formalize them into a narrative that placed kings as god kings.

We are still doing the same thing for the same kinds of people today, the theology is just more complex, often disgusing itself as secular.