Well yeah, a militia is a bunch of armed people with a goal.
A well regulated one knows how to use those weapons effectively, and as a group. In my opinion the law as it stands falls short of the mandate: The US should provide public weapons training and make sure its citizens know what the hell they're doing. That might actually save a few lives that are currently lost to accidents.
I'm saying the words that made it into the bill of rights he championed explicitly say more than that, probably because it was written by James Madison and then cut down by Congress.