We couldn't possibly sign Lee. He's strictly a 2. The hole is at 3, and neither Lee nor Burks could play 3.
I agree generally, but Hayward can play 3, too. And at the end of the day, you get the best players you can. Fit definitely has to be taken into consideration, but the Jazz's need for shooters (and quality wings in general) is greater than Hayward's disadvantage at the 3 (he's a tweener anyway).