According to scriptures suffering of a person is due to committing of sins in previous births.
But for those who do not believe in rebirths, suffering is not evidence of sin.
According to them laws of nature do not make difference between nice and corrupt people .
Nature is morally blind,without values,uncaring about who or what,gets in its way.
Weighing good verses bad deeds is absurd.
A bridge has no conscience neither the brick walls of a house.
They may collapse due to heavy rain or if they get aged.
It is human kinds innate tendency to extract meaning from calamity.
The search for such meaning may be found in moral guidelines laid down by our spirtual leaders to guide the human kind in a virtuous path.
It is an attempt to advise people that bad things happen to those who violates moral guidelines or commit sins.