Miller might also not have the ability to play SF and have a bum knee.
Second rounders rarely pan out and the Raps at least when BC has been in charge hasn't got a single guy who's played meaningful minutes. I guess it depends how you want to gamble but the payouts aren't even close. How many players have come back from knee surgery? Not a lot but more and more each year as advancements are made in the medical industry. Much rather take a risk on someone who could be potential very good rather then someone who will be lucky to make a roster let alone play.