trying to see the advantage in that.....
You might use the pole pruner instead of the tag line from point A to B, but I would definitely recommend using the rope in getting over to point B.
You might try not using the biner, but what's going to happen is that when you pop the eye over the crotch, the weight of the rope will pull it right back through and your effort is for naught. Also it's harder to remove the eye from the pruner head without the weight advantage of the biner.
The weight of the biner keeps the eye suspended and hanging, once over the other side. You simply move the head of the pruner to the underside of the crotch, and hook the biner, pull it back to ya.
I have had an instance where the rope pulled the eye and a single aluminum biner back through, so now I'll often throw on a second biner, just for safe measure. It 'throws' off of the pole pruner head better that way, so one should not, in my estimation, skip either the caribiner(s) OR the rope. Thank you, Mike.