The 2nd Amendment was written for a different time.

[moondust]

19. British intended to seize colonists' guns

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The first battle of the Revolution was fought over gun control. The British government wanted to seize the lawfully owned firearms of the colonists. If British troops could disarm the militia, there would be less of a threat to their control.

This is one of the reasons the Second Amendment was added to the Constitution.
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https://www.mcall.com/opinion/readers-react/mc-american-revolution-gun-control-schuon-20150418-story.html

The colonists didn't have a standing army. Back then they needed their muskets to defend themselves, their property, and their emergent country. Particularly out on the frontier moving West there wasn't much law enforcement to protect them so they needed their muskets to protect themselves and hunt for food. And slave patrols apparently found muskets effective at stopping runaway slaves.

The 2nd Amendment reassured the colonists who depended on their muskets that nobody was going to take them away like the British wanted to do and leave them defenseless. It's in the Constitution!

Things are different now. We have an enormous standing military for national defense, law enforcement is common everywhere, there are no slave patrols, and gun technology is much more deadly. If somebody still has a legitimate need for a gun then let them present their case for approval.

In Australia a person must have a firearm licence to possess or use a firearm. Licence holders must demonstrate a "genuine reason" (which does not include self-defence) for holding a firearm licence[2] and must not be a "prohibited person". All firearms must be registered by serial number to the owner, who must also hold a firearms licence.