It sounds like, if one's uncontrollable ugliness factors are overbearing, he/she should opt out of a jaw surgery absent of significant functional issues because the results would likely be unsatisfying otherwise, especially given the sizable cost associated with the procedure.
Now I'm thinking, I should have done more research before making such a drastic decision.
it really depends on your goals. if one is just beyond the pale in appearance any surgery would be an improvement. the skill and technique of the surgeon is of course essential.
but yeah, as pekay as written about before it's pretty much impossible to take someone who is straight up deformed looking (comprehensively, not just the jaw) and make them top 80%.
hate to sound superficial but it's just the truth.