No no. What I'm trying to say is that the purpose of a CCW is for personal protection of "self." The right to bear arms was not intended to protect a house, but the individuals within it. Therefore, if I were to suspect a BG is burglarizing my home, the goal is to ensure my own safety (in the scenario where I am the only resident of the home). In order to do this, I would not go barging in to investigate - putting myself in harms way when I do not have to.
The homeowner had the right to walk into his home even while being burglarized. I agree with you. However, just because you have the means, doesn't mean you should. The homeowner made the decision to go into his home while it appeared that it was being burglarized - knowing that he might have to use lethal force. At this understanding, the homeowner is no longer protecting himself, but rather, his house. IF the homeowner had the intentions of protecting himself, he would not have went in the house. With that being said, the purpose of a CCW is for personal protection of "self." The homeowner went above and beyond what was necessary to protect himself, therefore, he might be charged with excessive force.
I have experience and training in clearing facilities and I would have never taken the course of action the homeowner took (which would be "being a lone ranger"). He could not be certain how many intruders were actually in the home, if they were armed or better armed than himself, or well seasoned. Too many unknowns..