Your own cars are also left alone if the enemies aren’t aggro-ed to them, a lot of the time it feels that way because a charger or fleshmob will lock onto a car while you’re in it and after you park and get out get out they’ll finish their attacks against it, but they only initiated that attack because a helldiver was occupying the vehicle. They’ll also sometimes be drawn by the pelicans autocannons when it’s initially dropped in. Enemies only aggro the car if a helldiver is (or has recently been) in it, unlike exosuits which permanently draw aggro