Vile Purge Hit Validation when

Since we love adding "server-sided"(actually survivor-sided in case of DH and pallet hits) validation stuff to DBD, why dont we do that to Vile Purge. Why should i spend 50 seconds in a chase, constantly hitting a survivor with an edge of Vile Purge, only to watch it not being counted on HUD? Every ranged killer has killer-sided hits, but not Plague for some reason?