There's already [edit: multiple] comments here that are blaming human anatomy, despite the competition not having this issue. No need for Apple to claim it.

It amazes me what people are willing to suffer merely because Apple makes it. Flights are one of the core ANC competencies, it boggles the mind that this wasn't found during testing.

I had a buzzing problem with AirPods Pro 1. Apple replaced it (both headphones) after year and a half of use, for free.