The most important benefit of secularism is to allow competing world views to have a discussion and understand each other better. The essential weakness of secularism is that it has no value-free mechanism to decide which worldview is allowed to hold sway. For example I'd like to watch the documentary above in order to better understand what would motivate someone to campaign so passionately and extensively for abortion. However I wouldn't want Gomperts to have the ultimate say on abortion.