Shooting an 80# bow on targets is a bit of over kill, but each to their own.
I probably wouldv'e offered a hand on the first couple of targets but after that they would have been on their own. Why should you stuff yourself up for the rest of the shoot because of someone elses choices.
Everyone in a group should have a job, 2 scorers & 2 arrow pullers taking turns (unless you have junior in the group of course), but even then some juniors are willing to give a hand either scoring or pulling arrows. Especially the older juniors. I have known some guys to have scored & pulled arrows for 4 days in a comp while others stood around talking to their mates in the next group. This takes the fun right out of shooting especially if you yourself have a shoulder or wrist problem.
I also know of some guys that can't grab the score sheets quick enough so they don't have to pull arrows. As far as I am concerned if you can't pull them, then don't shoot them.
I think there should only be one junior at the most in a shoot group at an official shoot. There is usually enough groups to split the juniors amongst. Not fair on the adults to multi task (score/pull arrows) when some of these junior bows can stick them in just as good as the adult bows.
I don't mind pulling arrows on paper targets but when it comes to 3D's even some of mine at 40# stick in pretty good, so there is no way I will pull arrows on a 3D that is twice the poundage as mine.