It's not about inventing problems, it's about competitive advantage. If everybody agreed that we didn't need to cut our hair, we would get used to it also, but

It's not about inventing problems, it's about competitive advantage. If everybody agreed that we didn't need to cut our hair, we would get used to it also, but having a hairstyle simply looks better. The same thing will happen with whitened teeth. The more people have it, the more those that don't have it will stand out, until we all need to do it. Welcome to the arms race that social life.