Kaguya is Stronger than Momoshiki
I see a lot of people disrespecting Kaguya talking about her being weak and she had to prepare an army just for Momoshiki. Stop the bullshit and put some respect on Kaguya's name. Kaguya was never defeated so far; let me explain what I mean. Kaguya never was pushed to the point where her life was on the line in no fight ever. She was sealed in both major fights she faces. She fought against a very strong Hagoromo Ōtsutsuki and Hamura Ōtsutsuki but was only sealed. Same when facing Sasuke, Naruto, Obito, Kakashi, and sakura. She was not pushed to the point of death, she didn't even break a sweat. She was just outsmarted and sealed.
While Momoshiki was completely defeated. He lost his life to Naruto and Sasuke. We could even argue that the naruto and Sasuke he faces were completely weaker than the ones that face Kaguya. Because they had the sage of the six parts power.
Also, the army she was preparing was to face off against the entire Ōtsutsuki race which she betrayed. She did not just betray Momoshiki. She betrayed the entire Ōtsutsuki and she knew she would have to answer to it so she was preparing a contingency to face off against anyone and everyone they would continuously send.