I mean, he’s kinda right though. If someone is set on committing a crime, they’re going to do it. Whether they get the weapon legally or not, they’re still going to commit that crime. The only way to truly stop crime is to stop people from having free will, which is impossible.
That’s not to say there should be zero protections. But take gun control in the US for example, there already are gun control laws, California being the strictest. And there are still crimes committed with firearms every single day. Even if you somehow (by actual magic because it would be actually impossible) banned sales of guns and confiscated every firearm the ATF knew existed, there are still so many firearms already in the black market, or smuggled across borders, or even 3D printed, that the criminal will still have access to firearms, conceivably forever.
I mean, look at fireworks. Most cities in California have banned fireworks, but every 4th of July the night sky lights up like a rave party. Or hacking groups that constantly cyberattack literally anything they can, just because they can. If people want to do something, it doesn’t really matter how much red tape you throw at them, theyre still going to do that thing.