Super underrated point - and one that I am not sure the general public always keeps top-of-mind, as human imperfection should be the default assumption. The whole system of air travel is designed so that wherever possible, multiple f*ck-ups can occur and not result in a catastrophe. The success of people involved with anything touching on aviation safety is best measured as in "how many f*ck-ups can occur in the same episode and have everyone still walk away alive?" If you can get that number up to 3, 4 complete idiotic screw-ups one after the other, and the people still live, you've really achieved something great.