The example that immediately popped into my head was the difficulty I had training lawyers to conduct a jury trial.

You spend so much time building up a persuasive story to tell, but at trial most of your mental effort is elsewhere.

You have the jury, individual jurors, the judge, the witnesses, and opposing counsel, your story, the opposing story, and rules of evidence and procedure. All of these things are moving and changing at the same time.

It felt unteachable. I've said things like "it takes extreme observation".