What matters is his death, and whether he dies or not depends on the combat.
That is, you control whether you or he dies.
And again, a good player controls whether he dies or wins.
Combat control… again.
I mean if you play with DH you have DH items.
Also, enchantments, and if I remember correctly, there is a recipe to create primals.
It’s not total control, but it’s enough.
And in Diablo 4 it is even greater with the codex.
The reason for the discussion cannot be an argument for the discussion.
Unless you apply circular logic, which is universally recognized as bad logic.
You can reset…that alone is a huge control tool.
And, even if you don’t want to call it control, you can’t deny that it is limitless.
Finding the incomplete item is the first step to having the complete item… losing the incomplete item is going back a step.
Taking a step back is losing progress.
Losing progress feels bad (Lose character, lose items, lose levels, lose XP… I CAN go on 
)
Feeling bad when you should be having fun: is bad.
Conclusión: Tempering… is bad.