I grew up in a rural area and at 14 was an inadvertent member of the NRA. Why? Because it was the 1970's and the NRA's primary purpose then was gun/hunter safety and not the ridiculous PAC it is today. Although guns and hunting were not really for me it was and is still somewhat popular here. I don't really have a big issue with it as it seems to be a bit passé anyway.
But the question I usually ask when someone rails on the 2nd amendment is "Can you recite the first line?" That's right, you see in 1791 the United States had a ragtag army decimated by the English and in addition had to be concerned about Native American attacks on the frontier, the French or English on the North and the Spanish on the South. A well regulated, emphasis on regulated, militia is not some 9th grade educated MAGAtard with an AK47 or some other automatic weapon, see the difference? We have regular army now and have had for a couple of centuries. Perhaps the the time has come to amend this outdated bullshit to fit the real world and join the the rest of the industrialized nations where gun crime is significantly less.
One problem with your analysis, the whole pretense of a well regulated militia, armed citizens was to deter the overreach of the federal government not protection from outside threats.
In addition the right to defend oneself, armed defense being seen as a basic right, stemmed from their roots based in English common law. The King as well as the English Church tried on several occasions to disarm the population.
Written in the constitution is the means to amend it. Knock yourself out.
In the mean time, if you don’t own a weapon, you should buy one. If the Left has their way there won’t be much left in the way of law enforcement to deter crime.