How does this make sense?

The AA job is to control the sky and keep the enemy air assets grounded. So, how does this make sense I blew up 3 helos with double kills, 4 jets and when I looked at my kill count it was 1. Who decided that when you blow up a helo that your body falls  to its death after being blown to pieces it can be rez? The same goes for tank kills you can be blown to pieces only to be flung from the tank and be rez'ed. This is a major flaw equally as bad as a mortar does less damage than a grenade. Battlefield used to be realistic and been playing since 1942 now its just arcade game and insert another quarter to resume your game. A bullet from a sniper rifle to the head is instant death no rez but a bullet from any other gun can be rez'ed.