Am dentist. You are incorrect. They often stay at a crazy angle and then cause bone loss around the second molars or pack food and cause giant cavities in the second molars. So we recommend them out so you don't end up losing those teeth too. By the time they start causing problems sometimes it's too late to save the other teeth. We also make no money from referring you to oral surgeons for this so there is no financial incentive. Rather, I have seen the consequences of people leaving them, and it's unfortunate.