Let's say some significant amount of car accidents are due to driver mistakes. Should we not have airbags?
Now, people with declining mental health start using vehicles to commit mass murders. Do we ban cars? Do we ban access to cars? Do you see the problem?
Just solve the mental health crisis. Then we don't need to have 9000 prohibitions along the way.
Perfect mental health care will not make everyone's mental health perfect, in much the same way that perfect health care will not stop people dying.
As to crimimals and gun, at least for mass shooters - 77% of mass shooters obtained their guns legally [1]
As to the effectiveness of a ban- In 1996 there was a school shooting in Dunbane (uk) that led to 16 deaths. Stricter laws were enacted next year Most handguns were made illegal in 1997.
Later "According to data compiled by the University of Sydney’s GunPolicy.org, the U.K.’s annual rate of gun deaths per 100,000 people was 0.2 in 2015, versus the United States’ rate of 12.09."[2]
Maybe it would take longer here, maybe it wouldn't be as effective but we know laws don't stop 100% of the crime but it helps
[1] https://www.google.com/amp/s/www.nytimes.com/2022/05/16/us/p...
[2]https://www.smithsonianmag.com/history/how-1996-dunblane-mas...
So, we're just going to make a bunch of law abiding citizens criminals overnight? Do tell more about this utopian plan.
Maybe they should just make murder illegal-er, if you still think _laws_ have any bearing on the matter.