You have a point. Very small one, but you have a point. However: NO FRIGGING APC, HELO, Air-TP, none what-so-ever meant to carry you to battlefield will move into position on purpose where it is under fire! No APC, no AFV, no air-mobile, NO doctrine drives into battle men aboard. That being battle - recon is another issue. Units are always deployed before closing in to enemy.
Where's your point? There that yes, some helos have two-sided doors so they can turn the opened side to enemy, but you know what? Helo turns pretty damn quickly while landing... Overall, no point.