"What did the God Learners shout as they charged those pre-Lunar heptads? I doubt they associated the number with the finger goddesses (mostly lost and waiting for Entekos, if I recall). Were all their sevens shoehorned into classical Theyalan lightbringer associations?"
Well, maybe things in seven were considered to be a coincidence until (to put it in Lunar terms) the Goddess revealed deeper truth behind things in seven...