We have the echo and Hydaelyn's blessing, hence our massive amounts of power. Hydaelyn is much more akin to a god and not a primal (Note how she existed with or without people). If just wishes and prayers with aether could somehow conjure up the WoL, Eorzea would've had the WoL a loooong time ago. I really don't think the WoL is anything close to a primal, more akin to a god's chosen warrior.