You are thinking it wrong. There were 100 combat encounters. Let's forget the human life. The cost to train an F15 pilot is $9.2m https://thumbor.forbes.com

You are thinking it wrong. There were 100 combat encounters. Let's forget the human life. The cost to train an F15 pilot is $9.2m https://thumbor.forbes.com/thumbor/960x0/https%3A%2F%2Fblogs-images.forbes.com%2Fniallmccarthy%2Ffiles%2F2019%2F04%2F20190409_Pilot_Training.jpg https://thumbor.forbes.com/thumbor/960x0/https%3A%2F%2Fblogs... So if the combat and the pilots were lost and we had to train new pilots, the cost to train new 100 pilots for f15 would cost $920m. I'm sure it cost less then $920m to have good UI design in the F15 cockpit.