Who said kids are not wise?
She rejects them on the ground that they are so stuck up in their past that they don't see beyond their nose and this is stupid how?
Oh yes she is.
In the amount of time I could write up an argument, you could simply watch the video I posted on the first page. That YouTuber says it all.
Children are only occasionally insightful. Anybody who's spent time around kids knows this. A kid might be able to observe that adults spend too much time working--not doing the things in life that make life matter. Then, that very same child will hit a sibling, or have an "accident" because he "didn't know" he had to go. ...Yeah, that's pretty much Sera. Observant, but not really aware of the meaning, and then the rest of the time she just does things, but is incapable of articulating her thoughts.
When she asks the inquisitor about his/her actions, and she disagrees, you're stupid. Yeah, she's a child.