Not too confusing to you. But you are not a constitutional scholar. SCOTUS judges are.
I apologize if I give a little more credence to their understanding of the constitution than I give to yours.

I will edit to add that my argument is fallible though. I don't always agree with what SCOTUS decides, and I am just a law school student, not a const. scholar. I also realize that had SCOTUS ruled against gun ownership as an individual right, I would have disagreed with them. I am not saying that you have to agree with everything they say. My point was merely that if it's so clear cut to you, it's probably a good sign that you don't understand it as well as you think you do.