Most gun owners lack using logic and common sense.
Many gun owners on this forum believe we shouldn't restrict guns because the bad guys will still get them.
Then what is the point of even having laws to begin with? Also gun laws will help hinder and restrict people who shouldn't have guns from obtaining them or firing them. This is common sense. Of course it wont stop all the bad guys, but it will stop some, just as harsh laws against duis have lowered the number of drunk drivers on the road.
While your message has an obvious logic to it, it leaves off the negative aspects. Here are a some of those:
1. Did prohibition of alcohol and then prohibition of many recreational drugs reduce their usage? Or did it;
a.) give rise to criminal organizations and a lot of murders and all that come with criminal organizations?
b.) create new federal police agencies - the FBI and the ATF
c.) put a lot of people in prison, turning law abiding citizens into criminals and all the harm to their families - and with recreational drugs require building prisons all over the country and the #1 reason people are imprisoned and given criminal records?
2. If a mass murderer or murderer can not get a gun he believes will kill lots of people, will he be cured or otherwise not want to murder people? Or will he use bombs, poison, aircraft/drones, and/or arson that has mass murdered many times more people than mass shootings ever have?
3. Enforcing anti-gun laws gets people killed.
Think of the example of trying to enforce gun laws in two cases in a sequence of events;
a.) Ruby Ridge - over an undercover officer convincing a man to cut a shotgun barrel 1/2 inch too short,
b.) Waco - over allegations of a full automatic rifle
c.) Oklahoma City bombing - a retaliation for Waco
Enforcing gun laws in just 2 instances resulted in over 850 victims with over 200 killed. Although there were lots of guns involved and fired, the vast majority of deaths were not by guns - but by fire, poison gas and a bomb. By far the majority of those killed were innocent people not involved in the crime or enforcement of the law at all - and overwhelmingly most killed were with the government - and the vast majority were innocent bystanders.
Notably, the mass murders in that sequence were not by guns. Nearly all killed were innocent people not involved in any illegal activity.
Guns are NOT the true "mass murder" weapon. Rather they are the least lethal way to commit mass murder.
Just two attempts to enforce gun restrictions and the result is over 170 federal employees dead and nearly 700 in the hospital, dozens of innocent civilians dead, massive property damage, the government losing millions in lawsuits and people in prison who otherwise would not be - only becoming criminals due to trying to enforce the law in only 2 cases.
Over 200 innocent people killed and over 700 in the hospital - many crippled for life - all for just TWO illegal gun charges - mostly people with the government - and mostly children and women.
There are probably tens of millions of firearms that fall into the current definition of "assault weapon" and 5 to 10 times as many high capacity magazines. Given the historic realities I just cited involving prohibiting what people have and want, history says the result would be exactly the opposite of what you hope for.