That's your position. A perfectly respectable position.Which of course is the proper interpretation.
An alternative is that it was a finding.
As a conditional, 2A says "as long as we need a militia, people get guns." So if you don't think we need a militia in the 21st century, we don't have to let every idiot have guns.
As a finding, 2A says "A militia is needed, people get guns." Two distinct, if related thoughts. You may not think a militia is still needed, but it was when they said it. But whatever your view of the continuing need for a militia, people get guns. Because that's what 2A says.
Either of those interpretations is plausibly what the founders were thinking. Or what the eligible citizens were thinking when they approved the Bill of Rights - which is really what counts. But we don't know. And even if we did, should we be bound by the possibly shortsighted or even mistaken views of long-dead people shortly after fighting a war with Britain?
The simple truth is that no one alive voted for that amendment. In fact, no one alive voted for the original constitution or most of the amendments.
Why should any of the portions of the constitution (or any of our laws) apply to any of America's current occupants if under a majority of those alive today had any say in them becoming the law?