It's not about power. It's about the tone of the campaign. Indiana Jones is about a world filled with ancient wonders that can be used to accomplish things, and the ability of adventurers to save the day. Call of Chutulu is about a universe that doesn't care and things above men as we are above insects.
It's not about how much power is involved in raising Hecate, it's about can the hero stop it without losing his mind at some horror that he can't comprehend.
CES