You said:
it still appears to exist as something that exists regardless of human brain activity.
You appear to be saying that people have the same moral capacity regardless of brain activity. It is shown,
with evidence, that people behave differently when physical harm is done to their physical brain.
If I take a perfectly serviceable DVD and put into a malfunctioning computer then what I get on the screen and in the speakers can be scrambled. That doesn't mean that the DVD can't be removed from my computer and put into another one where it will function perfectly.
That analogy doesn't follow. What YOU seem to be implying is that you can put a non-functioning dvd (brain damage) into a non-functioning dvd player (damage to the body) and still get a picture. When in reality, it is shown that as soon as the dvd is scratched, the picture quality (mind) degrades.
If you have hard evidence that says otherwise, I'm willing to listen.
"Why don't you call upon your God to strike me? Oh, I forgot it's because he's fake like Thor, so bite me" -Greydon Square