Cosmetic dentistry has the potential to do a lot of things: it can improve the first impressions you give in professional and personal contacts. It can make you more likely to get hired (and improve your lifetime earnings) or make you more likely to get a second date. But none of these things can be guaranteed so they’re not good reasons to get cosmetic dentistry.
Instead, the best reason to get cosmetic dentistry is because you want to improve the appearance of your smile. If the appearance of your smile makes you unhappy, then that’s the best reason to get it improved. Unfortunately, some well-meaning friends may try to talk you out of it. But don’t let them.