I've made the analogy before that there are tasks that are like walking, and tasks that are like weightlifting.

If you give someone a task of a marathon, someone could complete it in 2 hours and another person 6-12 hours, but they both finish. If you give someone the task of lifting 500 pounds, it will never get done by most people.

Accidental complexity leads to more accidental complexity. When small errors early on build exponentially, you need to find those that can do so with minimal mistakes.