Some of us didn't need a reason to take voice lessons, except that we really wanted to sing. I started studying voice because I liked singing but didn't have any confidence as a singer. It took me a long time and a lot of work, but I became confident in my voice and now enjoy sharing it with people. I don't place much value on talent, and I think the greatest talents are teachability and hard work (aka "grit").
Here are a few reasons why I think people should take voice lessons: