I don't think this is a good comparison. The second ammendment was appended in 1791 if I'm not mistaken, i. e. shortly after the war for independence on american soil against an empire, which was fought with militias (hence the third ammendement). That's a totally different scenario than the 21st century.
It should be monitored who acquires an assault rifle. Or you end up with the highest rate of school amok per capita globally[1], because gun owners are either mentally unstable themselves or not capable of preventing a mentally unstable person from getting hold of the rifle due to a lack or knowledge. Licenses make just as much sense as they do for cars.
Which brings me to the division of powers. The constitution balances executive, legislature and judiciary in its three articles. It is very difficult for either of these organs to abuse power without being met with a restriction. This has been the concept since the very beginning, as you surely know judging by the gh handle, and you bet the federalist paper authors favored an institutional solution over arming each citizen.
In other words, the second ammendement is just as little of an ultimate for checks and balances as the web 3 is for whistleblowing. We already have securedrop and globalleaks. Going a step further is possible, but not strictly necessary, and should not be treated as such in my opinion.
[1] https://www.statista.com/statistics/1155011/number-school-sh...