When they need, they’ll learn.

100% agree. But. If you are a principal engineer claiming to have experience hardening the thing, you would expect that learning to have already happened. Also, I would be absolutely fine with “I never had a chance to dig into this specifically, I just know it at a high level” answer. Why coming up with bs?

Maybe those engineers were like that too.

I mean, we are talking about people whose whole career was around Kubernetes, so I don’t think so?