I so much agree.
Each child had their own personality, so you have to treat them with a slight difference from the other. There is a happily married couple here that’s had 6 children and each one is different. Some are like night and day. lol! So you have to raise each one somewhat different because some are more prone to fear while some do not fear as much.
But much of that has to do with the mother while the child is in her womb. They share her feelings.
Of course, some of this is genetics, while the rest it the child’s environment. They do feel any stress, or love from the mother.
Hope you didn’t mind my interject.
My stepdaughters are twins and their personalities are totally opposite. Their half sister is different than both of them and my daughter is also her own person. Somehow, how our household remains civil, although a bit chaotic at times. No one here has similar personalities. Not even close to it.