Yes, that is the difference in our views. The 2A speaks of its right in terms of the militia. But that's an obsolete concept. Heller, on the other hand, addresses the individual RKBA which is relevant to each and every American. I support the right described in Heller, which I believe the Constitution protects without regard to the 2A.
Well, my belief it is even more fundamentally important to retain our abilities to fight against an increasingly abusive government by strengthening the resolve of Americans to retain the unfettered access to defensive ends to do so, i.e. - firearms.
The second Amendment was not just about what you call 'an obsolete concept' of usage by armed citizens against King George's revenge, but for the abilities of every American to withstand the internal struggles with that abusive government.
The Founders knew full well that giving government more power leads to more abuse, unless measures like the 2nd Amendment were in place.
BTW, thanks for articulating your position clearly on this issue.