I think the 'elementary mistakes' in humans are far more common than confined to the mentally ill or intoxicated. There are entire shows/YT channels dedicated to grabbing a random person on the street and asking them a series of simple questions.

Often, these questions are pure-fact (who is the current US Vice President), but for some, the idea is that a young child can answer the questions better than an 'average' adult. These questions often play on the assumptions an adult might make that lead them astray, whereas a child/pre-teen answers the question correctly by having different assumptions or not assuming.

Presumably, even some of the worst (poorest performance) contestants in these shows (i.e. the ones selected for to provide humor for audiences) have jobs that require agency. I think it's more likely that most jobs/tasks either have extensive rules (and/or refer to rules defined elsewhere like in the legal system) or they have allowances for human error and ambiguity.