That’s quite more informative than I expected. Yeah the impression I had seems to match well the “common misconception”.
Well, it’s one of those things that even people that argue the matter don’t always pay attention to. The 2nd amendment advocates ignore a lot of the history too. There’s a lot of identity politics involved in it, much like any hot button issue.
So the misconceptions spread way faster than the fact based opinions (of either “side”, there are arguments for how and when the 2nd can be limited without violating the constitution). For someone outside the country, it’s a lot of mess to wade through for little benefit.