Convention dictates

Perhaps we've strayed off the actual page since a book convention is a thing, as is a book conference. I always think it requires agents - in the particular meaning of someone driving, compiling, scribbling - and books are inanimate objects whatever their attributes. Books only write themselves in metaphor.

Unless they're filled with photographs or illustrations, writers of some kind are needed. But it might be some other factor that causes their ongoing success and viability. A familiar name, a well worn trope, a snappy title.

Shredder worker and journeyman can go to festivals all they want but they won't be for them or their trade. 

Because a conference is about getting down to business, there are ones where copper wire is discussed in great technical detail.
Tinned copper wire is used in a leadlight workshop.

Most of the other events that work for books only take us to literal panels where copper wire is used. Conventions - as I noticed when looking up other terms - relate to the gauge and tensile strength and so forth of the wire. You could see whether compacting operators gather for any reason; the suspicion is they don't.

Arthur Hailey is remembered, if not had his work set in English exams; because he sold somewhere between 150 and 170 million copies of his books. He wrote thrillers which helps in the popularity stakes. The same fame and acclaim is not bestowed on the best copper wire salesman or their regional manager.
A wire and cable manager doesn't do the job for exposure so he wears a hat and a hi vis vest.

Statista tells us  "Total global copper production from mines amounted to an estimated 22.5 million metric tons in 2016. Major producing countries include Chile, China and Peru."