In Realistic battles it would make difference because you need to lead manually and without seeing the ship it will be very difficult.
You are right about arcade since you basically have “wallhack” and you can just shoot at lock marks
You have same “wallhack” in RB with “green arrow”
You still need to adjust range and carrot updates only couple few seconds. In AB its instant.
That’s not true by any means.
There is a lag time but it’s shorter than realistic.
But it’s still a “wallhack”