Circling back to the original topic, I don't even think it is accruate to describe it as a story about a dragon "forgiving" an omicron. The point of the meal being shared is that it inspires feelings of nostalgia and builds a connection to a past that the dragon thought had been lost forever.

The idea of food being something that connects people to each other, and reminds you of a more pleasant past is actually a pretty common one in literature, and you can see it in everything from Pixar films to Tolkien. I wouldn't really describe a classic literary trope like that as "childish".