Sure, it's a literal fact of the text at hand that "self defense" was such a given in the 1787 context that it need only be implied by "life, liberty and the pursuit of happiness".
In what way? Was our young country truly so lawless that people routinely had to take the law into their own hands because the people who lived here were so atrociously uncivilized that there was violence on the streets as an everyday occurrence in every town?
Hey, speaking of moveable goalposts, why don't you admit that the Constitution was a pact between States written to create a Federal government, while specifically not re-inventing that of Great Britain? Of course the ideals expressed in the Constitution are not about, say, downtown Salem, Massachusetts. Guess what? That was a matter for. . .Massachusetts.
The concept of Federalism has been completely obscured by the motorized goalposts of Progress, no?
Can you tell me of a case where someone needed a giant clip of ammo for self defense?
Once upon a time, there was a Godless Commie dickhead named Slippery Slope who was running for office. And he was a gungrabber. He knew that he had four goals:
a: Keep getting elected.
b: "Take Action(TM)" via legislation
c: Hollow out the 2A by making a series of purportedly "Who could possibly argue with that?"
statements to make the right of self defense so costly as to be unavailable to the hoi polloi.
d: Shrilly shout about how stridently he supported the Constitution, while rendering it moot and burying it in endless regulations.
Fortunately, there had been enough shenanigans that the voters saw through his falsehood, and voted his Commie butt out.
So he cursed the NRA, and the patriots who saw through his disgusting little schemes.