...just to make it clear before the Goblin Wars both Nergal and Qetesh had been the main gods in the land... calling their worship Cults is kinda unfitting, most of their Temples and conclaves got destroyed in the war and their Priests and followers killed admittently.
Nowadays they are fledgling Religions, a shadow of their former glory, but still religions.
They apparently never had shortcomeings of new Alcolytes that turned into Priestess before by what Zivah tells us.
More like he removed the eternal youth blessing or more likely inversed it's effects.
Makeing them seem like eternal Grannys

Also Qetesh is still worshipped in some regions, same as Nergal, just not on the scale as before the war.
Have you tried talkeing to Zivah before heading out?