What is the point for my friend's vocal lessons?

My friend told me she's been taking vocal lessons for the past 8 months. I've heard her sing many times and she's never been that good. I'm really curious why shes taking lessons? She doesn't take choir and she says she doesn't like singing in front of other people. I understand that vocal lessons are for improving your voice. I thought that you had to be born to sing... Is it just for her? I'm just very confused...