Aside from everything else, I think the mythology of Luciferianism is interesting.

Like, recontextualising the bible in a Luciferianism, gnostic way I think tells a very different story; where Satan was kicked out for questioning an unfair authority, with the old testament god being a deceptive demiurge. In general, I think gnosticism is a super interesting re-framing christianity, into a manichaeistic mindset.

I find it similarly interesting the the Islamic figure of Iblis, who (in some sections) is a Jinn. In Islam, in addition to Angel, who are Good, and Demons, who are Evil, Jinn are spirits who can choose. And as a result, Iblis Choosing to disobey is seen as, in some ways, a greater sin than demons, who are just by their nature Evil. (This is a simplification of the story of course, and also it takes different forms; Iblis is sometimes an angel, like Lucifer).

I say all of this as an atheist; I just like the stories.