Waiting can have a downside as well.

The first thing the NRA will do after a shooting is call for a "meaningful discourse" and for all the facts to come together.

They stonewall for a few weeks, weathering the storm of emotion, and then hold a press conference saying that the tragedy would not happen if there were more guns everywhere.

I personally believe there's a threshold for immediate groundswell of action, but that threshold is nowhere near being met yet. As you said, it's largely speculation right now.