Except for a handful of people almost everyone else has some form of tooth related problems when they are born and some of them get them through mishaps like accidents and diseases. Regardless of how you end up with them, crooked teeth are a major setback for anyone whether they are teenagers or adults because in certain cases if left unchecked it can go on to be the cause of a lot other problems related to your teeth for example it can lead to tooth decay and cause various bite problems and over all be a hindrance to maintaining good oral hygiene.
The best way to deal with crooked teeth is to get braces but in most cases this treatment is avoided for various reasons some people choose not to get it because they think it's a setback to their social image as wearing braces makes a person look different and not in a very good way either so it's not readily accepted by most people. Another reason for this might be that some families might not be able to afford the treatment and especially if they have a lot of kids in which case the cost will become even more unbearable.