A stalker, not stupid and well-aware about the protection, visits iFixit for a picture of internals, takes a drill, and physically obliterates the buzzer, right through the case. Epoxy or superglue for protection from the elements.
So they plant an Airtag, it gets found by accident, shit hits the fan, Apple's name goes in the news, journalists start journalist things, people don't are outraged and demand Apple's repentance, AirTags made of diamond-covered vibranium, including a microphone to control the buzzing and stopping working if buzzer is broken. PR problem not solved, and the core problem of humans not understanding technology is not solved.