In reply to Javelin :
Just because a solution is imperfect doesn't make it not worth doing. Does everyone wear seatbelts while driving? Well no, of course not, but the deaths per capita due to not having our wearing them is a fraction of a percent of what they were beforehand. Why not craft laws that make the likelihood of this happening significantly less?
If the age to buy a firearm was raised to 21, and required a universal background check, and required a state license with minimum training, that would have been 3 steps of deterrent to the 18 year Uvalde gunman. If the law was 0 compromise on being charged with the crime committed by your unsecured weapon, that might have prevented Sandy Hook. If guns were only legal as single pull / single round (no burst mode) and with low capacity magazines, that would have been another barrier to the Las Vegas shooter.
An imperfect solution can most definitely not be worth doing. That is how we make most decisions in life, by doing a cost/benefit analysis. You are pretty much saying that if there is a benefit, than the cost doesn't matter. Following your example, we could reduce traffic deaths by raising the age at which you get your license. True. Make it 21. Or 25. Less deaths, so that's a win. If that is your only goal. But it's not, driving a car is not only about reducing deaths, otherwise we wouldn't drive at all. There are many benefits to driving a car. We want to maximize the benefits while minimizing the risks. Guns should not be any different. But the reason why we have so much trouble when it comes to guns is that for many people, the benefit part of the equation is completely ignored, and only the risks are discussed. That won't get us anywhere. If I used a bicycle for my sole mode of transportation in a city, cars would be all risk and no benefit to me. I could accurately argue that cars are dangerous to me and should be strictly regulated if not outright banned. No cars would make my life as a cyclist much easier. Sure most drivers are responsible and don't endanger me, but there are some that are negligent and some that would try to harm me. The only way to zero risk is to ban cars.
Why should we not enact those laws? Nobody argued that the 2A enacts the right to shoulder fired rockets, mortars, or hand grenades, so why do assault rifles get a pass? They are all weapons of war used by military infantry (a well regulated militia).
There are strong arguements that 2A does allow for shoulder fired rockets, or to park a tank in your garage. But most people realize that these things are not reasonable, or the cost is so great that it's a non factor anyway. The cost benefit analysis does not lead very many individuals down that path. So we've settled into the equilibrium that we are at right now. I'm open to the discussion about changing the age at which one is considered an adult, but I have trouble with cherry picking different ages for different situations. People are saying that you should not be able to own a gun until 21, but want to move voting to 16, but they can enter the military (or be drafted) at 18. This doesn't make any sense. I realize that people mature at different rates. But we either need to stick to an age at which one is considered an adult with all of the rights and responsibilities. Or means test them to decide who is an "adult." Don't think that will ever happen.
We take away the right to vote from felons and the mentally ill, why not guns?
We do that, with felons at least, and in some cases with the mentally ill. But it doesn't have many teeth with felons. We need to make the consequences of being a prohibited possessor so strong that even the most hardened criminals think twice about touching a gun. Or they are locked up with the key thrown away if they don't follow the rules, problem solved either way. Mental illness is tougher. The definition of mental illness is vague and keeps expanding. If the net is too small, it won't do much good, to large and you impact people that shouldn't be considered mentally ill. It could also have the unintended consequence of keeping people from seeking treatment.
Rights are not, and have never been, wholesale freedoms without restriction or consequence so we need to stop acting like this one is.
Who is acting like this one is? You listed in the same post above a number of restrictions to the 2nd amendment. Who is advocating for machine guns? Who is advocating for grenades? Do we not have back ground checks, waiting periods, licenses, restrictions? While I understand that you want to add more restrictions and why you want to, pretending that the existing restrictions don't exist is disingenuous. It's also why there is such a knee jerk resistance to additional restrictions, because those demanding the restrictions often fail to understand or acknowledge the previous concessions.