Bad things can happen when there is a seminary-trained person at a small group Bible study: especially if that person is the leader. The combination of expertise, night time after work, and leader-as-speaker syndrome too often quiets the other voices in the room.
I’ve been on both sides of this problem: the talky expert and the quieted voice. Neither one is good. Communal Bible study must happen as community, not merely in community. Participation, not mere presence, makes for community. If it occurs otherwise, then it is probably a lecture–and likely a boring one at that.