I have done battle with those folks countless times. It is like arguing with a brick.
One very important thing does stand out: They refuse to identify "the thing", "the reason", "the mitigating failure" that made the mission fail or impossible to perform. Na-da. You see, there is no reason for the mission to have failed. It was an engineering problem that was solved by engineering and a great deal of expense.
“The problem is, those ignorant fools don’t know enough to understand why they got debunked.”
I have read a ton of articles and books on both sides of this subject, and the “debunkers” have failed to convince me.
I guess we will just have to agree to disagree.