A guy has 6 enemy on him, I stay out and drift to the side (if Im not 1 of the 6) and figure hes got enough problems and then he runs to me, bent on getting somebody before he dies.
If he just took them on, he may kill a couple rather than trying for a few pings on a plane, and exposing his six to the enemy without even trying.
Just always seemed an odd thing to do.