This is also taken into account in software engineering. Most software have defense in depth against single point of failure, they can recover or cope with wron

This is also taken into account in software engineering. Most software have defense in depth against single point of failure, they can recover or cope with wrong input. But you cannot compare them because the context is different: software is less regulated than aviation so while anyone can write of very bad software in 5min and sell it, this is not possible for a plane. And not everyone can pilot a plane, while there is no mandatory licencing and training to use a software. In addition, no safety feature on a plane can prevent the pilot from crashing it willingly. Setting such an easy password and not adding additional protection (due to lack of training) is self sabotage. So far, anything related to SolarWind points towards a bad usage of the tools.