For shooting moving target, I agree with the bead guys, or the no bead guys. I never see the bead and most of the time I'm not conscious of the barrel(s.) Though you don't see the bead or the barrels your subconscious does and knows where the barrel is pointing, while you consciously focus on the target.
Focus on the bead, barrels or a red dot or something other than the target and you are about to miss, as someone pointed out.
For a close, stationary target a bead is fine, an open sight better, a holographic or scope better yet. The farther the stationary target the more the optics help.
BTW, I hunt ducks in some of the nastiest salt mash you could find. Hunkered down, hiding, feet stuck in sucking mud... Still focusing on the target, still killing them, even when they're humping downwind at 40 or 50mph ground speed.
JPK
JPK