In the Bible (1 Corinthians 10:13) there is a promise God won't let you be tempted more than you can bear. There is no promise that you won't be given more than you can handle. The authors could just look around and see that's not true, they would have been laughed out of town in a world where half your children were likely to die before they reached the age of five, women often died in childbirth, and any injury could get infected and kill you; not to mention plagues, war, and natural disasters.
I'm not anti-Christian. I'm anti-stupid.