I like that; "potential users are [worthless]".

In most Free and Open Source Software this is usually the case.

Not because of the developers disdain but because the majority of FOSS was originally developed for one user only, the developer his or her own dang self. Potential users were not even a factor at the time of the original motivation.

The fact that it is in the public domain is because the developer chose to share it in the first place. This is a good thing.
Publishing documentation for tasks that one already knows is redundant. Perhaps a talented developer would rather spend his or her online time sharing more work that they ...developed. (rolls eyes sarcastically)

Ideally if a FOSS is useful others will find it. If it is good, those who found it will promote it. And if enough people use it, a community will develop around it.

In the end, the community independently provides a good deal of the documentation and support for many good and worthy FOSS efforts.

...for example. >> Clicky <<