Battles occur in minutes to hours, movement would be days to weeks. Coordinating sortees and naval movements to build up for larger invasion forces can take weeks to months.
It’s not illogical as time isn’t meant to be accurately represented - time in A&A is an abstraction (if not completely irrelevant). The rules are such to prevent leapfrogging and movement exploits exactly such as these, the implication being that the game is more balanced and the map designed with these movement rules in mind.
The current rules allow leapfrogging and movement exploits to the point where it isnt realistic.
If i have 1 inf and 1 arm i can move the inf in combat and the arm in noncombat to capture the coutries in the given example. IF i have only 1 arm i cant.
You can send in planes without a place to land and then after the combat deside if the carrier is moving to the landing spot, not realistic at all firstly the carrier needs to move at the start just to be in time and secondly the carrier does not know the planes are gone untill it gets there.
Or worst you can do a kamikaze attack because if there is a >0% chance the carrier can get there it isnt a suicide mission.
If you remove the whole non combat movement(except for air units ) you prevent suicide attacks as the rules dont allow them anymore and the games becomes a lot faster as well.