Reminds me of when I took the hunter safety course. I believe I was 16 at the time and there were a range of other kids from about 8-12yo and a guy in his college years. Most of us "kids" did very well except for two, the 8yo and the college aged guy.
The 8yo just didn't have the attention span needed to focus and the critical aspects of hunter safety. The college aged guy? When we did the live fire drill he left his finger in the trigger guard as he brought the 20 gauge to his shoulder, exactly what the instructers said not to do. He ended up discharging a round which hit the trap box and was immediately failed.
Goes to show 'ready' depends solely on individual. Wow when I count the years this took place awhile ago, yet I still remember it clearly.