First and most important is a matter of self esteem. You will just feel better.
Your smile being brighter will also make you feel more attractive.
It’s likely that having a prettier smile will have an impact on your job no matter what you do, even if you’re not in the public sector.
You may have an older crown that used to match the color of your teeth but does not now. It may be possible to bring your tooth color back to a shade better matching the older crown.
On a more humorous note, how about looking good for that school reunion coming up?