Though I agree partly with this review, I have to disagree that it is not based on whether we should try new things. I think it is more about staying in your lane. You already have a job you are good at don't try to steal other people's. Be content with where you are, and find ways to make it better. Not everyone is cut out for other positions. It like the 1 Corinthians 12, everyone has their gifts and talents, but it is a body or community where everyone comes together to help out