It's a failure to understand skill. People who have not done something don't understand that skill matters. Look at any skilled trade. Everyone thinks they can cook as well as a head chef with just a few months practice and a cookbook, but the head chef will beat them because those years matter. Even when thing seem equal, skill still matters. If you give two top experts the same task, one may have specialized skill in the task. This specialized skill not only let's on expert complete the task, it may totally prevent the other expert from completing the task altogether. To they lay person, the reaction is "I don't understand. they are both experts.". Skill matters more than people understand.