IMHO, I think it could be seen at first as a bit rude, but it reflect your frustration at the situation....which I understand totally.
I have worked in the healthcare administration industry for over 20 years, I can assure you that I've seen such frustration many times over the years. But, it's not 100% the doctor's fault. Exwitless is correct in what she stated and most people do not realize how much the government and regulations are involved in what you are billed from the doctor. Also, the doctor doesn't choose to call that procedure a "surgery". All medical services must follow specific coding guidelines and the billing code for that service falls into the code range for "surgery". Many times there are things involved in tests or procedures, which may look quite simple, which the patient may not realize that comes into play. The fees are to include various factors such as equipment, overhead, and many other factors. Sometimes what may look simple to the patient may actually involve more complex factors behind the scenes, so to speak. There are many factors which affect the fees which providers may bill and governmental regulations which control how doctors can no longer just accept as payment what the insurance alone pays without billing the patient for any co-payments, coinsurance, or deductibles.
I'm sorry for your frustration and understand it 100% and I think that the doctor's office should take your concerns the correct way and not be offended, but they may not have much control as to what they can do to change the situation. And, give the coding and fee regulations, you will probably find the same or similar situation with any other provider you see for that service.
I hope it all works out for you and especially works out with your health, not just your bill. :-)