My reasoning is that a drow priestess CAN'T use her gods weapon.
They can.
Tempest and War domains both get martial weapon proficiencies. And there's the feat that gives you proficiency in 3 weapons of your choice.
No-one ever said that devotion to the goddess Elistraee was supposed to be easy (That ONLY female elves can become Sword Dancers shows that it's not supposed to be just agiven that anyone can dedicate themselves to her)
