These lists just drive home the point that being rich, famous, powerful, influential, or even intelligent doesn't prevent one from being blissfully ignorant of a particular body of facts.
If these people really believe that life without firearms is even possible, let alone desireable, then let them begin by advocating the disarmament of our police and military as an example of how we can live in peace without killing and injuring people with guns. What, does that sound moronic? Of course it does, but that will not stop the ignorant or hypocritical voices in our midst who choose only to see what they wish to see.
Guns are not for everyone, especially the criminal and emotionally disturbed segments of our population. But restricting firearms as a blanket approach will not make guns go away nor prevent them from harming humans. What we need are more people who understand and accept firearms, know the power and proper use of them, and have the conviction to refrain from using them on humans unless life and limb are threatened.