I can't speak for everyone, just myself. In regard to adjustable sights, I have a number of revolvers with such. Once set, I have never fiddled with most of them. IF you are changing loads and want to re-zero for the new POA/POI changes, they are of value. Now if you are doing metallic shilouette over 100 yards, and you change ammo, there will be the need for changing sight settings. Also, if you are shooting a bullseye course outdooor, there is a 50-yard stage of fire where known adjustments can be of value. Those are the only times I have found them to be more usable. Most of my revolvers are "set 'em and forget 'em".
But most folks don't actually USE a revolver for much over 7 or 15 yards, where there is relatively little difference betweeen POI when changing loads, even betweeen 158 gr 38SPL loads and same bullet at 357 velocities. Beyond 15 yards, the difference may become more aparrent.
It all depends on what you are doing with it and what you expect. And how much fiddling you are prepared to do to get there.