There are no clear-cut answers as to why God heals some, and not others. We know that Jesus healed the man at the pool of Bethesda. However, he not heal everyone gathered at the pool that day–– why? The disciples also wondered about such matters. John 9:1-3And as Jesus passed by, he saw a man which was blind from his birth. And his disciples asked him, saying, Master, who did sin, this man, or his parents, that he was born blind? Jesus answered, Neither hath this man sinned, nor his parents: but that the works of God should be made manifest in him. Point is, both of their assumptions were wrong.In similar fashion, Job's three friends counseled him on the basis of their limited understanding as to why he was suffering. Their assumptions were incorrect.At the end of the day, I lean on the rhetorical question of Genesis 18:25... Shall not the Judge of all the earth do right? We must trust in his sovereignty and providence (Proverbs 3:5,6) knowing he is the potter; we are the clay