Depends on Task.
Personally I find them distracting.
I learned to shoot without a front bead or anything..."shotguns are pointed - not aimed". I taught students to shoot with BB Guns with sights removed, ( as per Brister) then transitioned them to shotguns with beads removed...on purpose.
As I get older and my eyes are going thru what they are, I appreciate being able to see. First Rule of shooting any platform " you cannot hit what you cannot see" [target].
Moving targets , clays, doves, quail, ducks...I really don't see the bead, if the gun has one - I really don't see it;heck I have shot clays and hunted game without one. For moving or stationary targets...I do fine with a front bead only, for more precision - gimme a mid bead along with the front bead - My preferred set up btw.
That said - a dedicated Turkey or Deer Gun I can see a benefit to a shooter - only shooting stationary targets , having Fiber Optic. Especially with aging eyes and low light conditions.
Me...I'm gonna pass, too onery, hard -headed, and I hate change on some things... might clash with the wood and blue....