The problem is that gun rights advocates willingly take on the onus of proof when it comes to gun ownership. The 2nd Amendment was ratified long long ago. The burden of proof lies squarely on the shoulders of those who wish to do away with the 2nd Amendment.
Imagine trying to demand proof that the 1st Amendment is necessary. It's not necessary, except to a free state.
From Wiki:
In 2008 and 2010, the
Supreme Court issued two
landmark decisions concerning the Second Amendment. In
District of Columbia v. er, 554 U.S. 570 (2008), the Court ruled that the Second Amendment protects an individual's right to possess a firearm, unconnected to service in a militia
[1][2] and to use that arm for traditionally lawful purposes, such as self-defense within the home. In
dicta, the Court listed many longstanding prohibitions and restrictions on firearms possession as being consistent with the Second Amendment.
[3] In
McDonald v. Chicago, 561 U.S. 3025 (2010), the Court ruled that the Second Amendment limits state and local governments to the same extent that it limits the federal government.
[4]
These are interpretations of the BoR. The argument of "should" doesn't come into play in the USSC cases. "Should", then, is an individual decision, unless anyone here thinks that the USSC will overturn it's own rulings.
What will happen is placebo legislation on evil features, things that the gun ignorant person thinks makes a gun more effective for killing, like forearm grips and magazine capacity and black synthetic stocks.