No, that's exactly what you're saying. They stated it was vague because "it had to be," implying repercussions if they were too identifiable. The nature and purpose of whisper networks (which operate exclusively through gossip) is to allow important information and warnings to spread without such dangers.

By insisting that only those who can make clear accusations ever speak of issues, you are also stating anyone who faces jeopardy should either accept additional risks or not bother trying to pass any information. The worst this person's statement could lead to is others watching critically for a reason why or investigating further. That's a good thing, I think.