I recommend removing Disembark as preferred context option (second line, where the most sensible context option is highlighted). It is still a quick option when scrolling up (for beginners who don't know the menus) and can be accessed any time by pressing 4 and then 1. I cannot think of a scenario where pointing at a car to make AI disembark would make sense.
Especially since "Move" and "Attack" are by far THE most important commands in a tank battle when commanding via the map.
Also, this has been around since Arma 2 and hasn't made sense back then either.