Because it shows that it's perfectly plausible for people ages 50 plus to appreciate the value out of these technologies every bit as much as us whippersnappers. Some of them are writing books about it, after all
You seem to have forgotten the context of this conversation. Right now we're talking about whether 50+ somethings can appreciate the value proposition of the 1-800 line and more generally of the whole line of GPT releases presently coming out.
Pointing to the book authorship help support the intuition that our Gen X friends are able to get it, because after all, it's not out of the question for them to be involved in these very fields. I don't think any of those points, which again in this context are the points that are under discussion, are things that hinge on whether or not the book specifically addressed particular llm methodologies.
