Generally speaking it is called EMPATHY.
To me is much easier to empathise with someone who is in the same shoes as I am.
Having a terminally ill relative is sad, hard to deal with but that doesn't cut it with me. sorry....
There are charities for cancer, etc etc....
But you know what happens with those money?
Research projects are being financed, then if a cure is found, it all becomes business, patents, etc, etc.
People like the team who discovered penicillin (not bloody mr felming) are a dying breed.
If a cure for cancer will be found, that would mean lots and lots of money.. blah blah..... if it sounds like you care for someone else, then is ok to make some money while you "show you care".
One day you will eventually wake up to the real ugly world we live in.