If that were true, wouldn't we'd only be seeing gun control proposals that directly flow from this event, not all the "usual suspects" that are also being proposed again? E.g. the "gun show loophole", which has not been implicated in any of these events to my knowledge. But it turns out gun shows are a vital part of the US gun culture and shutting them down, as the fine print of these proposals would do, would do it grave damage.

We're seeing a whole lot of what some people define as insanity, doing (recommending) the same thing over and over again, regardless of results. That doesn't strike me as a response to this event, but opportunism in using it.