Except in Today's NBA, because the assist gets so much credit that no, any decent passer does not make the extra pass.
It's not about ability, it's about knowing when to make the right choices. Dun was good at that.
That doesn't mean he was the most valuable, in fact, I think as a player, Dun proved his game isn't exactly playoff friendly.
A player like Hill is much more valuable. That doesn't mean Dun's game didn't help with offensive flow. Him and Josh combined to make a really pretty offense.