I can understand your concern. I would not want to have to sedate my child and she is 14!
We never had any issues with cavities and my daughter's teeth started coming out normally at 4. By 10-11 she had her 12 yr molars and everything that was supposed to happen by age 12. Perfect set of teeth, just early with it.
We go to Catherine Judd (she is the new pediatric dentist that took over Dr. Tipton Asher's office). She is very good. Would you feel better getting a second opinion? That might help ease your feelings. I can imagine that it would be quite difficult to work on a toddler's teeth with the child awake and holding mouth open.
I agree that if you ignore it and "wait" for them to fall out normally, your child may be in severe pain and things could get much worse.
Who knows when "normal" falling out is.....I was shocked and scared when my newly 4 yr old was losing teeth in preschool. There are some kids who start losing teeth late as well....we can't predict when that cycle will start.
Also......we have been Dr. Asher/Judd's patients since daughter was 1, however, I have heard very good things about Dr. Brister and have friends who love him.
Best wishes to you.