I think this is an unfair take.

The necessity of teaching nurses that doctors orders are not sacrosanct comes from the bitter experience of doctors giving orders that are wrong.

Asking for clarification is great, but doctors can be very reluctant to hear. The bottom line is that the nurse must not do certain things and the certification exam is there to make sure they know it.

Think of it in relation to the “anybody can stop the assembly line” part of quality control.