If we treat ourselves as if we're still kids, would the world be a better place?

How much easier would life be if we treated ourselves & each other as if we were still a child? I argue that we hold way too high of a standard as adults just because we have lived that little bit longer than a child, acting as if we have lived this life before. So why is it that when conflict arises, we often "act like a child"? We are all just wounded children living in an adult's body and I think life would be so much easier for us if we embrace this.