Someone can present a plan, explain that plan, and be completely wrong.
People are forthcoming with things they know they don't know. It's the stuff that they don't know that they don't know that get them. And also the things they think they know, but are wrong about. This may come as a shock, but people do make mistakes.
And if someone presents a plan, explains that plan, and is completely wrong repeatedly and often, in a way that makes it seem like they don’t even have any concept whatsoever of what they may have done wrong, wouldn’t you start to consider at some point that maybe this person is not a reliable source of information?
People are forthcoming with things they know they don't know. It's the stuff that they don't know that they don't know that get them. And also the things they think they know, but are wrong about. This may come as a shock, but people do make mistakes.