I care because people with brain issues have a hard time in our society, why would it being physical make me not care?

With strokes and 'poking around in the brain' I just meant that there's a lot of evidence that when part of the brain is damaged it causes certain expected behaviors which would suggest that it's a physical system.

'Metaphysical' can be used by different people to mean different things since it's loosely defined as relating to things that are thought to exist which 'can't be seen'. This is why I asked for clarification, but I was mainly disagreeing with the idea that it's something supernatural or magical.