It was an economic victory for the U.S. more than anything else. There is always a balance. It's just like the hoopla over hypersonic cruise weapons. Sounds horrifying. Until you realize the trumpet bell makes countering them easier rather than harder as long as you detect them early, because there is simply no way to reorient quickly at those speeds without being torn apart.
Further, no one is saying we should stick with manned fighter craft, only that they won't likely be the silver bullet everyone seems to think they will be, will be fraught with their own weaknesses, may not in the long run be cheaper than man operated, and may Coe with unforeseen doctrinal changes as the enemy adapts.
War is complicated, and rarely does who has the cooler gun perfectly translate to who wins or loses.