The most useful thing a surgeon can tell you is what an operation will not do. It is also the thing most likely to be left out of a consultation, because it does not sell.
Faces are asymmetric before and after
Nobody has a symmetric face. Your eyes sit at slightly different heights, one side of your jaw is a little different from the other, and your brows are not twins. Surgery does not erase that, and attempting to would make you look less like yourself.
Many patients notice their own asymmetry for the first time while studying pre-operative photographs, and conclude it appeared with surgery. It did not. It was always there.
Healing is a variable, not a constant
Two people can have the same operation performed identically and heal differently. Scar maturation, swelling, and the final settled result vary between individuals for reasons that are largely outside anyone's control.
This is why honest before-and-after photographs matter and why any promise of a specific outcome should make you cautious.
The right expectation
The goal is a face that looks like a rested, better version of yours. Not a different face, and not a perfect one. Patients who go in understanding that are, in my experience, the ones who come out satisfied.
If a consultation leaves you with the impression that everything will be corrected, you have not had the whole conversation.