When you know what you want out of life, you can make better choices. It's like having a map. But a lot of the time, we can't put our finger on what it is we want or how we want to live. So instead of making a special effort to figure out who we are, we float through life miserably letting things happen to us that we don't like.
We all live our own paths through life. Sometimes we need to hear about what's working for others so that we can reflect on our own lives and figure out what will work best for us.
When many people are sharing their perspectives on life in general, you can pick and choose what's right for you without pressure to persuade anyone and without pressure of being persuaded by others. This is what helps you live your best life.