Assuming the World is Evil Without God

It seems that those who claim God is good for healing people assume that without God nothing positive could happen in the universe.  I saw a post today on Facebook about a woman who had breast cancer that had a mastectomy, survived, and had a child.  The caption for the picture was "She survived breast cancer and is now having a child.  GOD IS GOOD . Who all agrees ?"  The number of people agreeing that this was due to God's providence was astounding to me.  They all seem to believe that the earth is an absolutely horrid place and that God is responsible for any good that may come about.

Why Do People Believe This Stuff

I've often heard it said by apologists that Jesus must have been the son of God for Christianity to take off otherwise no one would have believed it.  I offer this as my rebuttal:

"Hippies head for Noah’s Ark: Queue here for rescue aboard alien spaceship"