There are lots of successful actors, politicians, business people, sales people, etc. who are subjectively "ugly" to many. It's rarely about looks.
Social skills, on the other hand, are important but, much like physical fitness, can be learned and trained unless you have a serious disability. Someone not willing to invest in their social skills might well deserve to fail a 'character test' for that reason alone.
Too bad attractive people are convicted less often by juries, receive more one-on-one attention by doctors, receive higher grades in school, etc. Read "Looks" by Gordon Patzer.
Social skills, on the other hand, are important but, much like physical fitness, can be learned and trained unless you have a serious disability. Someone not willing to invest in their social skills might well deserve to fail a 'character test' for that reason alone.