Bailed Out Crews Question

[Imp]

Not been in the military but everyone can I assume use small arms even the cook its the level of training.
Infantry practice firing rifles LMGs etc & infantry tactics while crews & support staff practice whatever they do whether its firing an arty piece or driving a tank.
So for all but perhaps light mortar teams its a last resort we are not happy tactic.

Oh well, one more for my SP wish list - I'll add it just below being able to direct fire on buildings in LOS

Im intrested why? To rubble it when its empty