You're right. History is about connections. The people who set up the US government had fought off a great empire, and they set up a system to ensure that their government could not be brought down by the same forces.
Why would a group of people who just tossed off the chains of a suppressive empire turn around five minutes later and tell their own people that the British style of suppression was in their own best interest and the way things will now be again and if they don't like it, they can bow down to the new kings anyway? That's probably one of the fastest ways there is to get lynched.
If you read through everything, you'll find that we the people have the ability to throw the constitution out if we decide it's bunk and no longer in the interest of the people. If we toss the constitution, those people in charge are out of a job.
The express purpose of the 2nd Amendment is to provide people for the Militia...if you want to read out of context, you cannot ignore the preamble of the 2nd amendment.
which says:
"THE Conventions of a number of the States, having at the time of their
adopting the Constitution, expressed a desire, in order to prevent
misconstruction or abuse of its powers, that further declaratory and
restrictive clauses should be added: And as extending the ground of public confidence in the Government, will best ensure the beneficent ends of its institution."
At which time entry #2 was "here's your ability to shoot back if we step too far out of line."
They had to write a two edged sword. One was to keep a wacko group from taking over thus for the best interest of everyone as a whole. And the other to keep the gov't in line as a subject of the people.
How exactly do you write a simple straightforward document that says "don't mess with us" and "here's the bullseye on our head if you don't like what we're doing?"