There is no reason to respect the Supreme Court's decision in Heller when they claimed (under the guise of originalism, no less) that the first 13 words of 2A - the part constraining to a "well regulated militia" were "merely prefatory"

There is no reason to believe that easy access to deadly weapons makes you safer. There is no reason why gun manufacturers shouldn't be subject to the same product liability laws that knife, rope and rat poison manufacturers live by.

There is no reason to believe that your right to enough liberty to kill supersedes my right to enough life and pursuit of happiness to stay alive.

There is no reason why schools, theaters, places of worship and all our other common places should be obligated to invest in security and miiiltary-level hardening just so that some emotionally fragile dude can cosplay as GI Joe.

And yes, the rebuttal to every point I made above is "well, US law is the reason" or "the Supreme Court directly contradicts what Sean just said". WHICH IS THE PROBLEM. Those are political choices. We don't have to accept those choices in a representative democracy.