Talk:Purity of form

I'm confused. Doesn't the fact that the Primal Queen of Blades was able to at least temporarily house the powers of a Xel'Naga mena that at least a small fraction of humanity possess sufficient "purity of form" to re-start the Eternal Cycle. At least as soon as Stukov or some other Infested Terran manages to recreate the Xel'Naga secret sauce?