If it was in the Cayman Is., it was probably me.
To answer your original question, I do most of my dives without a BC, wing, wetsuit, weight belt or weights. It's a wonderful feeling of freedom - kinda like freediving with no obligation to ascend (immediately). You have to experience it to appreciate it. Your maneuverability and speed through the water are greatly enhanced. I should emphasize that I am referring only to recreational diving in tropical waters - no overheads, temperatures > 80 degrees, good viz, little if any current.
Is the BC (or wing) an added measure of safety? Yes, but only (given the type of diving I am talking about) in certain specific circumstances. If there is any surface swim in the dive plan, I will add a wing to my setup. If one is a reasonable possibility, I will add a wing. If I were to go unconscious at depth, my rescuer would be assisted by my having an inflation device. That's about it.
We have to remember that people dived for 15 - 20 years without BCs and managed to survive. To me, it's worth the small additional risk to dive that way today.
Believe it or not, it was on a dive boat off of New Jersey.
Well, come on down here and we'll do some BC-less diving ...