@JMM99, thank you for the response. Please ensure that the addressee's
nomme-de-plume is preceded by an at-the-rate-of symbol. That way, he or she will get a notification.
I agree with all you said.
If we go back into history, the Bill of Rights was introduced in an era (just after the Independence) when American commoners, and the regime forces, i.e. the British soldiers, and their loyalists, both has muskets (just before independence, but it's the same era nonetheless).
If we were to uphold the 2nd Amendment today, one would have to allow citizens to possess the same kind of firepower as the government forces do, such as, but not limited to, fully automatic machine guns, 50 calibre rifles, and even fighter jets (privately owned fighter jets are a reality as I write). This would ensure checks and balances between the government and the people. Of course, what I am saying is, perhaps, rhetorical. To come back to the point, today, fully automatic machine guns, large magazines, etc., are being outlawed. To me, this comes across as an effort to defang the 2nd Amendment.
Now, coming back to "well regulated," its definition is a matter of subjectivity, just like the NSA spying case, where one judge says that it is likely a violation of the 4th Amendment, while another judge says that it is constitutional.
Who gets to decide? That is the question.