I think anyone that does this, must have some arsehole. One would need it in such circumstances. It brings to mind just how big sharks are with an awful lot of teeth. The divers look like 'nothing more than' a light snake. The bars look rather flimsy too.
Yes, I take my hat off to these people who take such risks. I don't think it is stupid and pointless. I believe there is much knowledge to be gained. The photo is awesome and I can't comprehend what must be going through the diver's minds. I've a fair idea what would be going through mine. The picture is absolutely WICKED! :D