[MayeulC]

Hmm, I am just confident in my ability to follow instructions. I am certainly highly skilled in electronics, but repairing stuff isn't necessarily limited to that.

With good instructions, I can set out to repair mechanical parts as well (replace parts of an engine for instance), high-voltage devices, masonry, or other stuff I have never done before.

A good manual can make the whole difference between a successful repair, dealing a finishing blow to a product, or endangering yourself/others.

Making repairs easier probably makes them cheaper as well (less skilled employees can attempt them, it takes less time and is much more enjoyable). I know I would charge less.

Of course, the product has to be designed to make repairs possible, otherwise it requires a whole other level of skill (unglue parts, precisely cut where you need to).

And lastly, you can only go as far as your equipment will allow you. Sometimes all you need is a (included) screwdriver, but not everyone has a milling machine handy (though that would be an interesting use-case for fablabs).