Because it is the law, and when you're interpreting the law you can interpret the text in the historical context in which it was written ("the letter") or - when the letter is not 100% clear - what the people who wrote the law were trying to achieve ("the spirit").
Are we arguing we just start ignoring laws when we don't like them. The Constitution has a very clear means for changing it, which we've done dozens of times in the past. If we want to change it we can, nobody is holding onto it for the sake of it. We're following the law.
People are not holding on to it like it's written in stone like it's a biblical text? That's pretty funny.
My argument is that it's old, doesn't really apply well to the modern world. You say you can simply change it if you want to but your system doesn't really allow for that anymore. You have multiple 9/11 in dead schoolchildren and you still don't care.
What it does is putting guns in everyday situations, a road rage incident that ends in deaths rather than some bruises. Since there's no room for any exceptions to this right state lawmakers cannot make any laws that excludes people that should not be able to buy guns either.
Are we arguing we just start ignoring laws when we don't like them. The Constitution has a very clear means for changing it, which we've done dozens of times in the past. If we want to change it we can, nobody is holding onto it for the sake of it. We're following the law.