Every person has his own reason. You can't generalize. But we can say that everyone overcomes the difficulties of life in his own way. For some people alcohol plays role of the drug , someone solves their problems by dint of food, cigarettes, someone chooses religion. And few can to live harmoniously.

they got setress

For some people the world is an awful place, hence the need to escape ...

nice perspection. thanks

Lack of awareness and the weakness of faith in God