No slight on Dr. Hipp when I say this, but I guess it's not surprise that race conditions in safety systems can lie latent for years until they're wildly overapplied.
"This thing gives us safety and we want safety so we're going to do way, way too much of it until it breaks" seems like a hard to envision, much less detect edge case. I mean, I bet it gets difficult to breathe after you've buckled up the fifteenth or thirtieth seatbelt, but how would anyone ever find that out?