Well I agree with President Reagan & we also have to reject the idea that everything in this world yields to the Common Sense of The People.
Many things that we have proved to be true by doing such activities as building atomic bombs, orbiting spaceships, and exploring the bottom of the ocean, are not predicted At All by Common Sense.
From their experiences with the natural world, people just naturally think that pointed dart shaped things will fly the fastest, life would be easier with less gravity, and that no living animal could exist under 16,000 psi of pressure. It was once common sense that the Earth was the center of the universe because everything in the heavens seem to spin about us.
All of these things turn out to be absolutely false, kind of like the myth of the Noble Savage. Totally believable until you know the truth.
Those Noble Savages had lots of wars and slaughtered each other and sometimes engaged in cannibalism too, which is why many of those minor cultures seem to have simply disappeared from the planet.
They might not have had guns, or even metal, but those Stone Age people of the new world built lots of weapons. I don't believe that a man who builds a club out of a bone in order to kill his enemy is fundamentally any more or less noble than a man who builds a nuclear bomb to kill his enemy.
And the demented nutcase, absent a machine gun, will do something else: booby trap a bridge, cut the cables on an elevator, drive a truck into a Shopping Mall, destroy a public building, etc.