The first reason is because parents want to be lazy about snacks. If a child is willing to be sensible and help parents to bring up younger children, parents will save a lot of heart. For example, if the boss is good at math, they will consider asking him to help younger children with their homework. Parents should have helped the boss check his homework and then taught the second child.
The second reason is that many parents pay more attention to their bosses. When it's the second child's turn, I always feel like I'm doing something repetitive. There are many things in a day. Why do they do repetitive things? These bosses know how to teach, so how good is it for older children to teach?
The third reason is that the big ones are always big, so parents naturally think they should be more sensible. Young children like to tease people and make trouble, so they think that the boss has an obligation to help young children, keep him quiet and let him do anything.
After all, being a parent is not easy. One child feels lonely at home, and two or three children are really noisy. Almost two people will make trouble as soon as they meet, either laughing or fighting or crying. There is really no time to worry.
Speaking of it, there are many sisters in my family, and they often fight together, but I never knew my parents hated the noise at home so much. I didn't understand until I became a parent.
Maybe, after all I have said, you still don't understand. It takes more than two children to answer this question.