It is not her fault, it is just the whole universe (expansion) revolves around her.

She said I want peace and people came to her to exchange high value goods for low value ones so she can pass the trial; she wanted to relive her childhood festival experience and all of a sudden it fixed the crops issue; she wanted to befriend some would-be slavers who tried to enslave her and it turned out fine; she wanted to bring lizard people peace and her brother just abruptly forfeited his right of claimant, and provided a solution to the crops issue no one would care to solve for hundreds of years and thus suspended the lizard people's desire to expand...Of course she just preaches she loves peace again and again as it is all she needed to become the dawnservant.

The power of friendship is all she needs to solve all the obstacles: Bakool Ja Ja used to single handedly stopped her attack which she admitted that she “gave it all", but after a few days she beats the crap of Bakool Ja Ja and his dozens of lackeys while WOL stands watching. A few days in heritage foundry and her nation just developed enough tech to repeal floating carriers and laser shooting robots. Her power grew so much with "friendship" that she butted in the final battle, holding off the giant death robot's attack all on her own...Of cause she preaches power of friendship for the thousandth time as it just works.

To be fair, her character arc is so genuine because why on the green earth she wants to grow or develop anything when she succeed in becoming dawnservant and saving the world with her bravado and everyone loves the smell of her fart.