Then according to how the discussion goes (if they manage to have some learning outcomes or they do not speak much) you may conclude telling that leadership is needed when you coordinate volunteers, especially if you work with a lot of them (ex: organizing a festival or campaign with hundreds of volunteers, etc) so they should be aware that there might be people who are over enthusiastic and super motivated, others less or they should look for them and make them interested, try to involve everyone in the same way etc.