There are two points here: first, whether we analyse events, assumptions, rhetoric, so on, to get at facts, make predictions, or form an action plan. Second, whether we should then publicise such analysis and its conclusions.
You seem to object to the latter, which others have done for other reasons (they have raised the question: what is the value of saying “I told you so”?). I have responded on the value of “I told you so”s. I do not have a response to your point, other than to say that I disagree that the left has nothing of substance to say.
On the other hand, I read Julio’s post as an objection to the former (more on that separately).
—ravi