I first realized that their cause makes no sense at the start of the expansion because they can’t cleanse Titan magic… from a Titan. Azeroth is a Titan!
However, I realize that their use and veneration of the elements makes no sense either. They consider elemental magic to be so powerful and so great and yet we all know in early Azeroth’s history the void, as the Old Gods, easily took over the entire planet. The elements were their playthings! The elements even decided to be subservient during the Cataclysm. Razageth also got easily beaten by a void infused Neltharion. The only thing that stopped them was Titan magic…
I don’t think Sargeras and the Burning Legion cared much for the power of the elements either. They seemed to corrupt entire planets without much of a problem. Seems the Fel is pretty potent!
I also don’t think the Lich King let alone the Jailer cared too much for elemental magic as well. At the cauldron in the Maw as well in Torghast he could Dominate them easily as well.
What’s so great about elemental magic? I think these dragons have been locked away for way too long they seem to have no idea how powerless and little they are in a big cosmos.