I'm not sure that is entirely accurate WW...
I think MA and DA are actually different skills that don't overlap perfectly.
They don't overlap very much at all actually.
Success in the DA, in the ubiquitously common format of 1 vs 1 Co-Alt, Co-E, same plane/loadout, is to air combat as drawing a circle is to being an artist. I have participated in thousands of duels and filmed thousands more over the years. The single most important factor is the merge. Those who are very successful duelists have perfected a particular merge method to the fine point of a spear. They tweak it depending on the plane or the opponent, but it's almost always the same basic move. Ninety percent of duels are over in one or two turns following the merge, the percentage is higher than that if the participants have decent aim or one has a particularly weak merge move or blows it entirely. Duels almost always devolve into pure angles fighting if they last beyond a few turns. Once the angles advantage is assured the shots are generally close-in and fairly low deflection, affording time to hammer away indiscriminately with ammunition that need not be conserved.
Here's some examples that distinguish a duelling engagement from a MA flight.
There is no SA required.
There is no consideration needed for the careful balancing of the maximization of the strengths of one aircraft vs. the weaknesses of another.
There is very little consideration for E management required.
There is no need for cooperative tactics and communication.
There is no consideration required for ammunition conservation making good aim relatively unimportant as you can hose spray around and hope for lucky hits.
There is no consideration required for the adjustment of your flying to properly compensate for the state of your changing fuel-load.
There is no consideration for the exploitation of an initial energy advantage or negating an intial energy disadvantage.
Dueling is a wonderful way to master a Co-Alt/Co-E merge move and get familiar with "riding the edge" of a particular aircraft, but that's about it. That's not to say those are not valuable skills, but they represent only a minuscule fraction of the vast and varied skill-sets required in the highly variable and dynamic MA environment. So, the DA and the MA actually have very little in common. I know many who are geniuses in the DA, but are frustrated and abysmally ineffective MA flyers because the other skills the MA requires are grossly lacking. Conversely, I know people who's comprehensive diversity of skills makes them MA Mozart's, but they never completely mastered a Co-Alt/Co-E merge to razor-sharp perfection so are relatively weak duelists.