Allergies are not simply overactive immune response. It’s the wrong type of response. What’s really intriguing is how much we can do innate immunity that we have done relatively little with.

I would speculate it's something like, if your innate immune system is running "hotter", it's going to reduce the amount of time it takes to clear anything it runs into, leading to less time spent inflaming anything, in a similar fashion to how it significantly reduced viral payloads, leading to negligible symptoms when the adaptive immune system batted cleanup.