(A silly example, but hopefully effective in showing the trick of language.)
It's pretty clear that the founding fathers thought civilians should be able to own deadly weapons. The purpose for this was defense not only of the state, but of the individual.
But even though I am a gun owner, I think the second amendment is extremely dated and should be ignored. So what if the founding fathers thought civilians should own guns? However intelligent and knowledgable they were, they have been superseded in all dimensions by two centuries of scientific and technological progress. If gun ownership decreases crime, OK. Tweak the laws to increase gun ownership. If it increases crime, OK. Do the opposite. If some middle-ground licensing thing works, do that. I find firearms fun to shoot, and I could see how they could be useful in self-defense, but what I really care about is the well-being of people. It's best to do whatever helps people, not what some centuries-old text says.
Fortunately, if the Talmud and D&D have taught us anything, it's that people can interpret any rule to match their existing view. In the long run, judges will rule in favor of public safety no matter the text of the constitution.