But that is just it - you can use all the sophisticated techniques but there are 10000 ways to make a fatal error, and that number increases with every action. So even if you are 99.99% rock solid in your technique, it is a certainty that you will get caught with that one 'dumb' mistake. It only looks dumb in hindsight, but it was inevitable.

Getting to 99.99999% reliability is very difficult for one person, it usually takes a highly diligent team with very well-sorted processes.