He was most definitely an option and you provided no evidence that Booker wouldn't workout for us. Booker was in no position to not go to the team that drafted him.
Post-draft Kalipari mentioned that there were "a few" teams that he refused to work out for because "he wasn't going there".
Utah was certainly among them.
Booker
Marcus Smart
Chris Paul
Reggie Jackson
Are a few certainties that spring to mind, though Jackson refused to work out with everyone because he had a guarantee from OKC