Remember that the swiss cheese model of safety/security failure doesn't apply well to cybersecurity. At least in terms of its current general state.

Things are much, much worse in cybersecurity.

In the swiss cheese model, defense-in-depth exists to some degree. But there are just too many holes in each layer, too few layers, or some combination of both for protection to be robust enough to avoid catastrophe with extremely high reliability.

Meanwhile, in typical failures of cybersecurity in its current general state you might say, with little exaggeration, that there are more holes than cheese.