Nobody should be talking about Ereshkigal, that character is nothing to do with the source that Hickman is referring to. None of my quotes are about her either. They are all about the 80s Star Brand that Hickman has used as a source for this story.
We have seen in entire runs that the Star Brand contains as much power as the writer needs. The whole concept was a development of the wish fulfilment Captain Marvel of the Golden Age. The 80s was continually re-evalutaing the whole idea of Captain Marvel. In Star Brand he was turned into a character that was literally based on fulfilling wishes. Quasar is another example of this Captain Marvel re-evaluation and notably Star Brand and Nightmask turn up and perhaps without coincidence the cosmology was throughly examined.