daycare...

Okay so I just visited my sister and her AMAZING daughter who is 1.5 years old. And I learned that she puts her in daycare from 7:30AM - 4:30PM four days a week. And, it could be pregnancy hormones, but it made me SO SAD. I know it's a reality for many moms. So what I'm asking for here is to basically make me feel better about it haha! How can daycare be good for kids? What are some benefits of it?