At some point due to it being optional you would hit the off button to be competitive in combat. If instead it was forced on us as the standard, the game would begin self eliminating groups of players, especialy new players reducing subscriptions.
The requirments of SA in the game in multy plane engagements already taxes your mental endurance. The more things you have to remember to fly your fighter will be the separation point that a real life simulator would impose on who really has the right stuff to be an aircraft driver in combat.
In real life not everyone can earn a basic civilian flying ticket. How many of them eventualy become rated to fly aerobatics in a T6 Texan versus feeling accomplished getting safely from one airfeild to another on clear days in a Cessna 150?
Maybe air combat in this game is not your bag of gerbils. The players who enjoy it are usualy too busy engaging against other players to have the time for real life cockpit management chores.