"My Lord, tell the little angel not to kill him—this is getting interesting," Anthony quickly said, fearing that Emre might be obliterated by an enhanced version of Holy Light Flash.
Proliferators... are they proliferating people? No, they're proliferating increments. Only increments you can use are meaningful; if you can't use them but your enemy can, then it's not increment anymore.
The Star Progeny Master keeps countless measures in place to guard against Heroic Spirit infiltration, even allowing wandering gods like Ange to spread faith freely just to seize ecological niches.
Because divine faith has a center—all faith converges on the gods. Kill the god, and it's all over.
But Heroic Spirits are decentralized. Each of them is both the beginning and the end, the origin and the inheritor. In other words, these increments already have owners.