Lack of confidence in one's shooting - maybe, maybe not. Not all who attempt to shoot birds on the wing are capable either. It is a foolish comparison to make one practioner seem more "skillful" than the other.

It does say something about one's woodsmanship abilities to either call ducks in to land in one's spread and/or to sneak close and stay hidden to surprise said ducks. It is a skill those unable to accomplish tend to dimishment and dismiss. I most definitely cannot do the later consistently but the occasions I can are memorable. The former is much more common, tough not assured, and shooting ducks or geese as they try to rise is a simple task not requiring much in the way of ability. Except divers, they tend to show their backs and butts when taking off making for an easy shot but difficult kill.