Years earlier, she had asked a boss if he would let his children fly on a plane with the litany of flaws and non-conformances he was urging her to “pencil-whip”: “Cindy, none of these planes are staying in America, they’re all going overseas,” he retorted, much to her horror.
The real reason is that airlines don’t want a monopoly where there’s only one relevant manufacturer that can dictate airframe prices to them. That’s why you will see almost every airline trying to at least somewhat balance the scales between Airbus and Boeing.