sadly the effort does not lie with the one being carried but due to the class´ abilities him being easier to “babysit”
i wager a lot team compositions are not “random” but contain 2 or more buddies.
the weakest link not being as weak immediately increases the chances of (undeserved) success 
had a few good 40s today, all non arbites, each playing really well, some failed.
edit:
here´s one of the failed ones, i had more fun though than with any easy going run
end edit
so far, and from playing arbi in havoc 40 myself, the class alone could have kited 2 bosses far more efficient thus taking pressure of the team, which then ultimately ended both runs.
honestly, i´m more “proud” of good clutched losses than an easy win if they are based on physical skill, reflexes and player abilities rather than numbers behind pixels 
the “funny gap” is between auric maelstrom and havoc 35+
the former no one gives a crap about the odd man out, if he stumbles every 5 meters i guess the rest are having a good laugh and move on, nothing of “value” lost.
bad players un-babysitted tend to fail with arbi as well.
less often and less pronounced but the lower bracket still performs horribly.
the difference is no one “needs” him to be alive to make an auric maelstrom come to success.
in havoc though everyone is focused on not losing his ticket and get demoted, so everyone looks out for the others not to f-up and in case one still does, pick him up fast or salvage the situation.
in this “protected scenario” its by far easier to keep a toddler arbi on his feet than any other class due to his toughness regen alone.
all he needs to do is stumbling forward and keep whacking, i wager you´d find that even in the most limited abilities 
while thats not the proclaimed “goal” (and i guess most don´t even have a grasp beyond their “horizon” of “i just wanna play the game”) the twisted idea of every difficulty being by default suited for everyone starting the game, no matter the effort put in, is turning the game for the worse in my opinion.
if you remove certain requirements for a 1st place in any sports so suddenly a couch potato pot belly isnt far off from the mark, the “win” becomes meaningless.
pvp or pve, no matter the game there should be levels of difficulty no casual should ever reach lest it loses meaning to those putting in real effort and striving to better themselves.
i wouldnt want to see myself placing anywhere in the mr. olympia ranks given my physical limits or any sport really thats far out of my league and not in my wildest fever dreams would i have the audacity to demand scaling the requirements down so i wouldn´t feel (rightly so) like a flea on a dragons shoulder.
“a man´s got to know his limitations”
