Hi, may be you do not have excess crowding but may be your teeth are protuding out and that may be the dentists concern.. if it has to be pushed back it needs to have space behind and you will have a good face profile. But if you are too concerned and want to avoid the procedure you can do it.
Next Steps
Talk to your orthodontist understand his concerns and also clear your doubts regarding the same. Do not hesitate to tell your doctor that you do not wish to remove. However , this might affect the end of your treatment.