Supposedly Barbara Cartland used to write her many romance novels while resting on a divan, sipping drinks, while her stenographer and typist got down each word.
There are many, many ways to collaborate on a project. He's not "trying to fool" anyone. Shatner boasted in a "Starlog" interview that he used to narrate the lines he wanted Kirk and Jake (and TJ Hooker, too) to say, plus all the action sequences of his novels, into a dictaphone while racing around on errands, then he had his secretary transcribe the tapes so he could send a manuscript off to "the experts", the Reeves-Stevenses and Ron Goulart.
I'm sure many authors are experimenting with voice-activated computers these days. I recently had some surgery to a skin cancer on my ear and the plastic surgeon narrated his report to my doctor into a computer. Pressed a button, did some quick edits and emailed the report!