Which doctor(s) are you referring to?  If it's Brooklyn's orthopedist Martin O'Malley , he operated on KD's foot before I believe.  He fixed up Brook Lopez and also did Embiid's 2nd foot surgery.  He's sought after because he's a great surgeon.  KD & Kyrie might have had their minds made up a long time ago, but I don't think this had anything to do with it.