When I was 18, I had a friend, she was the youngest in a family of 18 children. There would have been 20 children, but two had died. In her case, the oldest had moved out when she was born, her oldest sister was 47 (when she was 18) she had never experienced being with all her sisters and brothers at the same time, like for family occasions. They had given up on Christmas and Birthday presents for each other early on, and celebrated as best they could without.
She had a plethora of nieces and nephews, and did not remember the names of all of them! Her parents of course knew all the grandchildren. She said they were a happy and well adjusted family, her parents were not particularly religious, they were not very rich, neither did they get any benefits.
All her siblings had left home now, they had jobs, were independent, some were studying at university, like her.
I dont know why a story like this is even interesting. Each to their own, and all that, and if the children are happy why not? Not my business what another woman does to her health, in the same way as I am not coming down heavy handed on smokers. None of my business.
I am assuming (I may be wrong though) that since the Duggars live in the US, and not in the UK, at least the husband works and supports his family, rather than getting benefits to support his brood. The article doesnt say.