Far fewer wisdom teeth are now taken out than in the past. If the tooth is not causing problems, your dentist will not want to remove it. They will only remove wisdom teeth:
When it is clear that they will not be able to come through into a useful position because there is not enough room, and they are also causing some pain or discomfort.
If they have only partly come through and are decayed – these teeth will often decay as it will be difficult to clean them as thoroughly as your other teeth.
If they are painful.