But if they put in a warning light, then they would have had to add an item to the emergency checklist for what to do when the warning light came on. This would

But if they put in a warning light, then they would have had to add an item to the emergency checklist for what to do when the warning light came on. This would entail explaining about MCAS. Which would have led to discussing how a single AOA sensor could control the horizontal stabilizer of the plane.