I did leave a post about what happened to my sister and her 4 children. She never when on welfare but she had a close knit family. So women with children whose husbands leave them with little support require time to be trained. As do people laid off due to automation or job loss.
But even those things need to have a limit so day 3-5 years

Best case is a 1-2 who lose a job but have a skill and can find another job.