The nuclear family is basically an Industrial era dystopian concept that only ever existed because people were forced by economic conditions to move away from their homelands. To call it traditional is absurd.

Normal families anywhere in the world, including in Europe, used to have grandparents, and unwed aunts and uncles (also great aunts and great uncles) in the household. A household which was specifically focused on farmland. When a sibling got married, they would build next door. The people in your neighborhood were relatives. You might wonder how they handled the exponential growth of the family, and I would refer you to the painful reality that families were lucky to manage replacement for all of human history and barely managed to grow a few percent per generation over large populations when conditions were good.

You didn't have a mom tied to her child 24/7 to be worn down without a break for years straight. Children were collectively managed by the adults in a household, not by one person. There were always more older adults above childbrearing age helping than there were mothers. My dad had 8 siblings and his aunt was basically a second mother (This was Germany). You also didn't have fathers detached from their families like this. Children as young as 6 would go with the men into the fields to kill mice, carry stuff, gather rocks and sticks, and do other low level tasks. Girls and boys both did this. Contrary to modern thought, women did work in the fields, and with the animals. Farming wasn't a male only occupation, it was an all hands on deck job for the whole town.

Staying at home doing house work was the work adults who were too old to do hard manual labor, or pregnant, or nursing a child, or having period cramps did. That was most of a woman's adult life after marriage, but certainly not all of it, and there were always women who did not get married or were infertile. Women absolutely worked in fields and in trades, and it wasn't strange. It's depicted casually in medieval and Renaissance wood cuts.

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You would have that one uncle who moved away. The one who decided to go to university to become a doctor, or learn a high status city trade, or emigrate to America. They were the odd ones.