It's true that BM is much easier; especially at lower gear levels.
But I have to say that when you approach higher gear levels (e.g. ilvl 190+) this advantage becomes much less as all classes get much more power.
At lower gear levels I had the same thing where my alts would get shredded in as little as 1v2 fights while my BM just pulled 6+ consistently; but that power gap is much lower now that my alts are on ~190 ilvl gear.
Sometimes its fun to kill stuff while kiting, but the Amphitheater is not one of those places to do so.
I see these hunters a lot too; most just completely misunderstand lone wolf and think it's a sin to use a pet as MM under any circumstance.
This.
A lot of people mistake the high burst / one shot potential of MM while leveling with efficiency. It's not.
Not only does BM have nearly the same TTK in 1v1 fights (longer time in combat maybe, but less time casting before combat); but it can also do much better AoE.
Pulling 10 mobs and having the pet cleave it down is much more efficient than anything BM can do.