Why do northerners like to eat green onions and garlic? Is it climate geography or other reasons?

To be exact, it should be "raw" green onions and garlic. Southerners only use these two things as seasoning. We eat green onions in the northeast with dipping sauce, not only green onions, but also all kinds of other vegetables, cucumbers and radishes. I think it's because most northern dishes are Shandong dishes, and Shandong dishes use more sauce, so we are used to eating like this. As for garlic, it may be the habit of eating jiaozi and big meat in the north, which makes garlic more delicious. Moreover, because of the cold weather, people find that eating garlic can greatly reduce the incidence of colds, so it has become a habit.