Remember that Astrid Lindgren was born in 1907, got pregnant at 18 and had to give up her son to a foster home for the first few years. She grew up in a completely different world, and it's no coincidence that a lot of her stories are basically about consoling traumatized children.
I am familiar with her background she was sadly later projecting into many/most of her books. I am pretty sure vast majority of Swedish kids was growing back then in complete families without dead mother/father, same as they do nowadays regardless of marriage or divorce status.
Emil of Lönneberga and The Six Bullerby Children are great books, the rest about traumatized kids/orphans not so much as kid books.
> She grew up in a completely different world,
Also, back then in 1925 infant mortality was probably ~10x worse [0], which adds to how we (today) might underestimate the prevalence of parent-child traumas.
[0] https://data.worldbank.org/indicator/SP.DYN.IMRT.IN?location...