If you ignore his mistakes and only look at what he did right, sure. Everyone is a hero by that standard.
So everyone who drafts have three Super Bowls?
I spent a great deal of time with a website that has all the draft picks for each team and broke down what Jimmy actually did.
He traded away enough picks that it left him just a bit over 100 picks in his tenure with Dallas. He blew it on about thirty picks. Mostly later round picks, and he was in the era where they had twelve rounds. However, his 1990 draft, if I remember correctly, wasn't as stellar as some. But I could be wrong on the year.
He had essentially sixty nine picks that could be considered to count, although all of them surely count against his drafting.
Of those 69 picks, he hit on something like 35 of them that directly contributed to Super Bowl victories.
I suggest you go back and take a look at what he did. Outside of Haley, he was pretty darn masterful at picking players.
http://www.drafthistory.com/