First, we have to go all the way back to the Enlightenment Age to remember the profound historical rift opened up between Emotionality and Rationality -- a divide that still rages fiercely in our politics today (even moreso of late, as it is consciously being stoked by Bad Faith actors both externally and internally).
Next, we look at how Emotionality has been aggressively gendered since (at least) then: women are the emotional sex, we've been told. Men are the rational, cool-headed arbiters of the Best Decisions -- mythologically, after long periods of research, praxis, and careful deliberation.
This allows the impulsive, cowboy, "Men of Action" strain of political derring-do to pass by largely unexamined as maintaining Rationality -- even when the only commonality between the two paradigms is often the possession of a Y chromosome. In other words, typically men get to appear rational even when acting impulsively, while women have no such culturally-accepted Emperor's New Clothes disguise and remain bucketed as "emotional," no matter what underlying behavior is actually being observed.
Look just a little bit closer, and impulsive acts are usually driven by emotional response. Psychologically speaking, impulsive behavior tends to derive from one's inability to process and moderate emotions appropriately. Instead, the emotions simply rule behavior as weak minds react quickly to their manifestation, without stopping to evaluate potential consequences.
Finally we turn our attention to the gun control debate. What is the underlying emotion that drives the vast majority of gun violence? Anger. But because we've been trained for centuries to dissociate men from emotion, anger somehow mysteriously gets a pass. Culturally-speaking, anger tends to get filed under "rationality" instead of emotionality. In this way, an irrational male attachment to military-grade firearms is rendered as rational, because Men As Symbols are simply viewed as unemotional decision-makers.
In this way, both anger as an emotion and an irrational emotional attachment to powerful weapons of war are rendered culturally invisible. To the existential danger of us all.