Dood,
It's hard to say exactly WHEN God helps and when he doesn't in this mixed-up world.
I would venture that in a situation like your father's, BELIEF in a higher power can help overcome a personal struggle, when such a struggle is not impossible. The thought that "someone is watching over us" is a psychological (perhaps spiritual) lift to many.
The difference with those who are starving, diseased and dying is that their struggle basically IS impossible to overcome. No amount of positive thoughts or psychology can change the system which brought them to their sad condition.
Gopher