I understand the direction of your comment, engineering doesn't guarantee security either.
Hubris is the single biggest downfall, whether it's pegged on insecurity, or a false sense of knowledge, superiority or entitlement.
The very best and most experienced people I know have deep expertise, and maintain a healthy mistrust of their own work to keep an eye on it and improving it.
Real world experience and run history is a big thing, and people can re-learn the lessons of the past over and over with their egos, or also be open to learning from others to learn quicker.
Hubris is the single biggest downfall, whether it's pegged on insecurity, or a false sense of knowledge, superiority or entitlement.
The very best and most experienced people I know have deep expertise, and maintain a healthy mistrust of their own work to keep an eye on it and improving it.
Real world experience and run history is a big thing, and people can re-learn the lessons of the past over and over with their egos, or also be open to learning from others to learn quicker.