[Salika]

I think generally the line between disfigurement and enhancement is pretty clear. There are might be some instances where they overlap or the line is blurred, but we can't base law on anamolies (this is an Islamic juridical principle). Law generally needs to have as many clear cut lines as possible so that people know what to expect. If someone thinks their situation is different, they can go to mufti about their specific situation... that's what fatwas are for. Traditionally, scholars did take into account an individual's situation and as a rule, a fatwa only applies to someone who is similarly situated.

Also, sometimes we just have to set aside our vanity and obsession with unrealistic perfection, which unfortunately, our society sometimes makes difficult.