Yep yep, exactly this. When an incident review reveals a fluke that flew past all the reasonable safeguards, a case that the team may have acknowledged when implementing those safeguards. Sometimes those safeguards are still adequate, as you can’t mitigate 100% of accidents, and it’s not worth it to try!

I’d go further to say that it’s a trap to try, it’s obvious that you can’t get 100% reliability, but people still feel uneasy with doing nothing