1.Many people who have grown up in multi child families think that being an only child is the best of all possible worlds. 2. They point to such benefits as the only child's annual new wardrobe and lack of competition for parental love. 3. But single-child status isn't as good as people say it is. 4.Instead of having everything they want, only children are sometimes denied certain basic human needs, especially companionship, privacy, and power of expressing opinion. 找出本段的观点句。