It sounds like you have been having some difficulty with your teeth and dental health--hopefully these extractions will help with the overcrowding and alleviate any of the disruption to your bite and the overall health of your teeth. It sounds like your dentist
might be concerned that the extraction of these teeth might be particularly difficult, and it will be helpful to have the expertise of an oral surgeon
who has more specific experience with challenging extractions. In addition, depending upon the type of anesthesia or sedation that would be best for this level of procedure, it may be better for you to be in a hospital facility with the ability to perform more detailed monitoring during a procedure. Some dentists do perform extractions in their offices, but others either choose not to do it at all or to refer more difficult cases to oral surgeons
If you have any questions or concerns about your upcoming procedure, you should bring those up with your dentist to make sure you feel confident going into surgery. You should also plan to meet with the oral surgeon who will be performing the procedure prior to surgery day. If you have any concerns, you can always seek a second opinion.