Toilet Reading...Metal finishing and files.

I have a copy of one of Ron Fournier's books in my bathroom, along with a nice stack of other literature to occupy my mind whilst I rid myself of wastes.

Anyhow, I noticed Fournier uses files to do his metal finishing...as does Kent White. This struck me as a little odd being that I have been to Wray's shop many times and I have NEVER ONCE seen him use a file in his process of finishing a panel.

I know there are many ways to accomplish a given task...just wondering if anyone could shed some more light on this for me. Why preach the use of a file if it's unnecessary? Wray, why not use a file?

I know there is a fair amount of misinformation in this Fournier book...well maybe not misinformation, just a different school of practice. insight anyone?