Convuluted head postures in the photos. Insufficient visual information for others to evaluate. Learn to take photos with proper head postures or use the ones the doctor took.
People who contort head postures to exaggerate a perspective for which others DON'T ususally see you in, IMO, will do that even after a surgery. Possible red flag for BDD.
If not BDD, the doctor might be assessing your complaint of excess facial bulk to a thick muscle. Muscles weaken/shrink with BONE LOSS. So, IF your excess face bulk is from too thick a masseter muscle (as opposed to too thick a FAT layer), then shaving your jaw might result in muscle shrinkage IF excess muscle is problem.
Did he tell you your excess face bulk was from muscle and NOT fat?