From a macro view, competence requires growth, right?
Look at the 60s - there's tremendous excitement about space, astronauts are heroes, everyone is putting in 10x effort to get over the finish line.
What Boeing is being asked to do now is replicate this every few years, except all the attention, all the excitement, all the growth is gone. They have to recreate the miracle, but nobody cares!
SpaceX comes in and says - we have a new heroic mission. Do the same thing, but make it repeatable and efficient and stupid easy.