The mongol people have hunted wolves with eagles for many years as a way to keep the numbers down and to catch them for fur. Its nothing to do with sense its about surviving. It may seem senseless to use who are tooled up with rifles, but to them its tradition and the only affordable method they have to hand.
From my limited knowledge on the subject
this is an age old tradition probably dating back to Ghengus Khan
it was not a way of life or a method of control
so nothing to survive in
just there are some traditions I don't agree with others I don't see any sense in
just like a tradition where you place a slit in the goats abdomen region , reach in and squeeze it's heart to kill it
It makes no sense when you had a knife there already
the ground they hunt is not animal rich or farmed for survival, so no need to control
and the amount of pelts they would take in a year is probably enough to by a couple of pints in the local
so no survival issuses on that count either
I like watching birds work but hate to see them get injured for pleasure unesseceraliy
and a 13lb bird rolling about with a 30lb deer or a 50lb wolf is not what I call common sense
as for the rifle status I'm sure if you tried to steal a bird or 2 off them
you would soon see where their natural abilities lay