The Constitution can be amended. However, an amendment which is not done according to the basic principles of American government is a foolish amendment, or possibly even a wicked amendment. It will fail, and it will cause a lot of havoc first.
For example, Prohibition. People certainly meant well, and alcohol was responsible for so many sorrows and deaths! Wine control! Whisky control! Why not outlaw it for everything but absolute necessities?
Yeah, it worked really well. Especially the part where the government increased organized crime, encouraged disregard for the law, and poisoned hundreds of thousands of American citizens in the name of keeping alcohol unsafe for drinking. Meanwhile, most federal government officials in Washington DC were allowed to drink freely, under exceptions to the law. When the Amendment was finally taken down after only a few years, it left carnage behind that is still being dealt with. (Not to mention the total destruction of American brewing traditions and thousands of local companies.)
One of the basic principles of our Republic, and one of the basic principles of American life during the days of the Colonies, is that every man who is capable should be able to defend himself and his family, and that the law encourages such self-reliance. Every man should be able to hunt, too, because it is useful for feeding the family. And because every man has a gun and knows how to use it, every town and village has its own fighting force capable of banding together against enemies. We don’t have to sit around and wait to be rescued by a central army; and in a big country, it’s stupid to do so.
Having a gun and knowing how to use it is a life skill, just like knowing how to swim without drowning, or how to use various kinds of knife for various tasks without stabbing yourself or others, or being able to light a fire and use it for various purposes without burning yourself or the whole forest. That’s why they used to teach shooting in the Boy Scouts, and it was even a thing in the Girl Scouts at one time. (In some places, it still is, I’m happy to say.)
Treating guns like some mysterious thing that is only used for shooting yourself or criminal activities is profoundly unsafe. It’d be like being afraid of scissors, or shuddering and turning away from every knife rack.
My dad had a gun rack in his house from the day I was born, just like my mom had a knife rack full of sharp incredibly doohickies, and several deadly heat-producing machines, and a medicine cabinet full of poisons. Just like my dad had a multi-ton killing machine parked in the driveway, for that matter, and a garage and shed full of poisons and sharp doohickies. Tools are powerful things. They exist for skillful use, not for fear.