OK I am not 100% sure what you are asking. First off, yes it is a personal right, just like every other right in Bill of Rights. It says right there “the right of the people to keep and bear Arms, shall not be infringed.” The REASON for this was so that the militia would have a large number of people and resources to pool from. It didn’t limit it to ONLY militias.
Furthermore, they use the antiquated word of “regulated” which doesn’t mean to govern and control, but for the militia to be well equipped and drilled. You can find militia laws passed in the 1780s and basically any man of fighting age could join, but they needed so much shot, powder, and supplies like food, bedroll, boots, etc. They had to be an asset, not a liability. Rich people owned artillery and cannons and loaned them out when needed. Or because they had the hardware, they were the officers.
Remember back then the theory was to have a very small standing army. Unlike Europe who was going to war with each other every other Tuesday, after the Revolutionary War, they didn’t have a lot of other countries to fight against. They didn’t even HAVE a Navy at one point. There were skirmishes with Native Americans, but no full scale wars. The theory was if they needed to put down a violent group internally or repel an invasion, they would call up the militias. It wasn’t until the War of 1812 that they put their model into full practice. Honestly it didn’t turn out super well. Too many of our leaders were too old or didn’t have experience running a war. The militias were inconsistent on how they fought vs British Regulars.
You mention the irony about putting down insurrections being part of the point, but at the same time that was the reasoning behind the use of Militias vs a large standing army. With out a large standing army, the federal government wouldn’t have military power over the states. Of course this all changed in the course of history.
So one COULD argue that the main points of the amendment was to have a pool for militias, it isn’t really needed any more, especially with the formation of the National Guard. But others argue while that was one reason behind it, another was just the general reason of defense.
Either way, it has been deemed a personal right, so you can’t enact some laws like they did in the UK (with mandatory turn ins) most likely. Of course our laws are plastic. They could repeal the 2nd Amendment, but I doubt they could do that any time soon. Doing so would be the big step in enacting what ever laws one were thinking about.