Depends on what's to be fixed and how many of those items, and setting - workspace as an employee, or doing DIY repairs at home on your own time, flexing your own principles.
I come from laptop/phone repairs and what you're suggesting won't fly in workspace setting where turnaround time for a fix needs to be quick.
At home too: laptops are constructed in similar ways, so are phones: open a few and you develop a hunch how to open next - no tedious paperwork necessary - just a little organization of your workspace and discipline.
What you're suggesting indeed applies only to teaching and some other (past) time when people were eager to share.
And if I'd have to repair my OM-1n, I'd seach for a repair manual that's already made decades ago, containing all the diagrams and repair steps in order.
I'm not a neat manual maker, I'm tinkerer - so it all depends on so many factors.