If the doctor chose one of the sealing methods over the other which you preferred, you gave a lower score of because of it, it still is not an indication of the quality of the treatment you received. You wouldn't have been qualified to determine the best method.
When you review feedback collected (in any situation analogous to what you mention), you take that into account.
What if the feedback also said the doctor wasn't personable? Maybe the doc could be a bit warmer with his patients... and a patient would be absolutely qualified in determining whether or not that bedside manner is present.
