You are not in a congregation listening to a Pastor give a Bible study. You are in a small group where questions can be asked, and answered, while you are studying. Experiences can be related that show how what is being studied has fit into someone's life. This can help you as you strive to apply the Word of God in your own life. Mutual edification happens very easily in a small group.
Every person has different strengths and experiences.
As the Bible is being studied or as some topic is being discussed, these strengths and experiences are shared. Different way of viewing the topic are discussed because of these different strengths and experiences. And everyone benefits. Each is allowed to share. Each is allowed to listen.