Huh.
Lucy can sympathize with that viewpoint, but it's not how she thinks of things at all. She doesn't really think of most people of having good deep down that can be kindled, she mostly thinks about aligning people's incentives so they behave well regardless of how innately good they are. Which might amount to the same thing, in practice, since she doesn't see any indication that "blow on the spark and inspire a flame" involves literally interacting magically with people's minds to amplify their altruistic impulses, or any other such mind control.
...Sarenrae...might, actually, have a more constructive view on it...someone who's behaving well because you're around to align their incentives might well go back to their wicked ways the moment you leave. Lucy didn't just tell Grandmother, "pretty please stop killing people because I asked you to," she introduced the Bazaar to Mum and Wilbur and has been making actual progress at convincing them that human lives have value...
...Even Mr. Veils--she still isn't sufficiently aligned with that Master to have had a frank conversation with them about anything that matters, but based on what she's gotten from the Masters she does talk to...even Mr. Veils might have a spark of something that could lead to a redemption arc...Lucy, personally, has no particular leverage to make that happen, but...
Maybe...Sarenrae's version is...what happens when you have a world full of allies. When you don't have to assume that, for something to be done, you had better either do it yourself or delegate it to a specific other person, and maybe have to bribe that person to do it...
And her symbol is the sun, it's so nice for there to be a Good sun Sarenrae still isn't a Judgment, that's not how it works even if she did speak to Lucy in Correspondence.
Lucy definitely wants to talk to a Sarenrite cleric more than she did before she read these books but it continues to not actually be urgent.