There are actually a lot of good that can come from a career in sales.
1. It makes you more confident in your conversational abilities
2. It teaches you the principle of getting paid for results instead of just showing up
3. It teaches you to deal with rejection in a positive and healthy manner
4. Makes you better at picking up chicks believe it or not.
5. You can make a lot of money in bonuses and commissions
6. Everyone hates doing it, so if you're good at it then you're super valuable to the company.
Now MLM or pyramid schemes are not what I'm talking about. I'm talking real sales jobs for grownups. In a real adult sales job you're dealing with smart clients so you can't bullshit them. Honesty and integrity are actually very important in that level of sales, contrary to popular belief.
Most people are too weak to succeed at it though.