So when demons and devils consipire to invade the celestial planes to overthrow the goods of goodness and justice, I shouldn't have rules? When Pelor and Hextor duke it out in the heavenlies (with far reaching ramifications on the Prime Material Plane) I can't determine who would win? The rules shouldn't determine whether your ancient hero can steal the secret of fire from the gods? David Edding's Belgarion can't take up the Sword of Riva and smite Torak, nor can Torak be maimed by Aldur's stone? Robert Jordan's Rand al'Thor will never be able to defeat the Dark One, nor could the Dark One have been sealed away in the previous age, or sealed away before that either? In Eternal Darkness, Ulyaoth, Chattur'gha, Xel'lotath, and Mantorok can't contend with each other, and no mortal would be able to have any influence on such a contest anyway?
Stories and myths are full of tales of mortals contending with gods, and gods contending with gods. Why should my D&D game be any different if I want that sort of thing? I'm not saying that Deities should show up on random encounter tables for heroes to slay for experience, but that isn't the only purpose to have stats either. The player may NEVER have the power, in and of themselves, to contend with ANY god, and that's fine. But what about other gods? What about quests to help out your god, to give HIM(/HER) more power so that he/she can defeat the evil one?
I'll agree that I'm not fond of Deities and Demigods either, but for a completely different reason... I just don't think it does a good enough job, which is why I'm looking foreward to the Immortal's Handbook. That should cover all my needs.