^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.
I'm not resistant at all. No question Vonda McIntyre originated a lot of Trek lore, including the idea that George Kirk was a Starfleet officer. But the idea of him being first officer of a starship began with Carey - and the earliest versions of the Star Trek
story supposedly began with Robert April and George Kirk on the Enterprise - an idea right out of Final Frontier