Very true. But the Federalist Papers do indicate what the Founders were thinking at the time.

I realize that. :) But what we ratified in the Constitution gave Congress and the individual States control over the militia. So you need to modify that thinking with what actually become law. Congress has quite a bit of power over it, and modernly, even more. Then what were the concerns expressed by the anti-Federalists that lead to the 2A? I think one thing touted was that the Federal government would enter the states and disarm the populace. (similar to that) Each state had its view, i.e., the Southern states needed arms to be able to put down slave uprisings, and for their slave posse(s) that continually scouted for runaway slaves. So the 2A seemed aimed to putting that idea to rest for all states.

Pretty much all of the amendments in the Bill of Rights were responding to complaints and requests that Madison promised to address in the first Congress in order to get the Constitution ratified. The anti-Federalists, led by Patrick Henry were quite vocal, but when the Bill of Rights was passed, all the complaining stopped. Later Patrick Henry got behind the Constitution.

The USSC is notoriously bad at history.