There are lots of reasons why someone might need to lose a tooth-
Failed root filling
If you are considering an implant then speak to the dentist before you have the tooth removed.
Ideally if time allows, the dentist who will place the implant will be in a good position if they extract the culprit tooth. This will allow the tooth to be removed as carefully as possible, for any infection in the area to be carefully removed and monitored and also for the bone in the area to be assessed. It may even sometimes be possible to place an implant in the space at the same time as the extraction.
In some ways it’s also nice to get to meet this person and build up a rapport with them.