I believe that's the intended effect. Sheer volume of misdirection, vague answers, and thinly veiled threats leaves people tired. Anyone might reasonably not have the energy to keep picking apart the nonsense from long evasive answers.

Still, as pointed out in the email thread, a CA is also evaluated on how trustworthy they are in a broader sense than the baseline requirements. Uncertainty and doubt is great at making people dizzy and muddying the waters, but compared to other CAs who respond with openness and transparency, the contrast is striking.

That's a strategy often used by lawyers: bury the opposing party in stacks of paper, if only to buy some time...

Not saying it's the case here ... but this kind of interaction can be difficult to distinguish from sealioning sometimes.