In a season about environmentalism and illness, Nodoka is in remission from a years-long infection and doesn’t want anyone to suffer the way she did. While she’s not quite depicted as disabled or chronically ill in the show itself, her arc focuses on recovery from a chronic illness in ways that can be similar to managing one.
It does have a spoiler warning, warns that it has spoilers for the entirety of this anime (screenshot attached).
Hum, I must have just completely tuned that out!
Happens to everyone sometimes :D