But this is not an indication of 'vanity'. Vanity means conceit, excessive pride in one's appearance. Concern about appearance is quite normal and understandable.
Attractive people have distinct advantages in our society.
Attractive applicants have a better chance of getting jobs, and of receiving higher salaries. In court, attractive people are found guilty less often. When found guilty, they receive less severe sentences. The 'bias for beauty' operates in almost all social situations - all experiments show we react more favourably to physically attractive people. It is not surprising that physical attractiveness is of overwhelming importance to us.