It could, depends on how it’s used.
The AO overrides bone position off the initial pose.
Whatever you tell it to play after can usually just blend in and out to the position defined by the AO.
The difference between AO aim and IK aim is that doing it via IK is exact, the AO it isn’t.
The Aim Offset attempts to line up animations to match where you aim. But the position of the gun is mathematically calculated between 2 different animations.
If you do the poses carefully, you can get good results.
But they always need an IK adjust when you aim down sights or better, when you need the hands to hold the weapon so it points precisely.
Most 3rd person stuff isn’t precise when it comes to this, so a crappy AO is often good enough to hit the target you aim at anyway.
Combine the 2.
Make your AO poses by moving the gun position in precise degree increments.