^That's really splitting hairs. McIntyre introduced the characters and Carey drew on that precedent -- just as several subsequent novelists have followed what McIntyre introduced in E:TFA about the name of McCoy's wife (Jocelyn) and the history of their divorce, and just as every
subsequent tie-in has built on what McIntyre established about Saavik's backstory in her TWOK novelization. McIntyre established a great deal of what's generally accepted to be true about Trek characters, and some of it has become canonical. I don't see why you're so resistant to acknowledging that influence.