I guess if we’re running thousands of sorties per week some are likely to be shot down by plain luck.
I'm surprised that A.A. didn't mention the F-117 that was shot down during the Kosovo War.
What he fails to mention during both Vietnam and during the Kosovo war, our aircraft used the same ingress and egress routes day after day, and in both cases the enemy knew when sortees were launched.
So if you know where to look, and you know when to look, you can hit just about anything.