She isn't fodder. She ist just weaker than Isshiki.
The problem with Boruto and the end of Naruto is that Kishimoto introduced aliens in a fucking ninja manga. No one needed her or Isshiki or someone else from their clan. It should have ended with Obito and Madara.
No, that's not entirely true!
Before that Burrito crap retconned Kaguya's origin, she was portrayed as the Moon Princess from a japanese folkslore. And everything around that made sense; Shinjuu Tree and the moon being an important factor.
That was actually interesting about Kaguya because back there, she wasn't just an alien, she was a princess but became a divine entity with incredible powers due to eating the forbidden fruit from the world tree.
But since that Burrito mangaka is perfect at writing crap plot, that guy simply threw all that interesting stuff away. The Juubi was a godlike creature but now... It. Is. Just. A. Fucking. Parasite.