My vote doesn't say that Ling Qi believes in Renxiang's ideals - because I agree, she does not. Rather, my vote has Ling Qi say that she think that practicing or being in contact with such ideals would make her a better person. It is a fine distinction but an important one.
The ideal itself is fundamentally both more optimistic and more selfless than Ling Qi is readily willing to accept; Ling Qi doesn't know if such a thing is possible, and there are limits on how much she would be willing to sacrifice for it even if it was. But those are only problems if you evaluate the ideal as a goal in and of itself. The act of working towards the ideal is valuable for Ling QI's goal of being a good person despite these issues. Ling Qi has expressed a desire to be a better person on multiple occasions, and it seems that she associates "being a better person" with having more selfless goals. Working with Cai means we would be working for something great, and doing that makes us a better person - even if the struggle is unlikely to succeed.
But Ling Qi's actions post joining CRX don't really indicate that Ling Qi is actually trying to be a "better person". Ling just did more of the same.
Here, I'll provide evidence:
Week 43: Cultivation, Training with CRX, spending time with Mother, spending time with Zhengui, meeting with Sixiang, turning down Gu Tai.
Week 44: Training and Item Research, Socialization with Zeqing, Meizhen, Sixiang, and Zhengui, Formations with Suyin, Haunted Mansion
Week 45-46: A whole lotta training and tutoring, Inviting Meizhen to the Vale, Advice for Su Ling and the Ma's, Spending time with Mom, Congratulating Xiulan, Party time for Sixiang, Finishing off Yan Renshu
Week 47-48: More training and tutoring, Shopping, Sect Jobs, Serious Spar with Meizhen, Binding Sixiang, Socialization with Hanyi and Zeqing, Fun times at an official Gala.
Week 49-50: Training and tutoring all day erryday, Sect jobbing, Introducing Zhengui to the family, Info gathering for Cai, Talking with Suyin, Talking with Su Ling, Training with Cai and ominous words from Sixiang,
Week 51: Training and Formations with Suyin, Words with Han Jian, Time with Xiulan, Time with Meizhen.
That is all that Ling Qi has done since joining CRX.
Spend time with Friends, Train, do Sect Jobs, and tasks from Cai.
Nothing here indicates that Ling Qi is trying to put more effort into caring about people she doesn't know. Nothing here indicates that Ling Qi is trying to be more "just". Ling Qi is still being Ling Qi.
So no, I don't believe Ling Qi is actually interested in being a better person, as she (and by extension the players) has shown no effort in actually trying to embody some of Cai's beliefs.