Counterpoint: most Open Source projects are (or started off as) programs people built for themselves, and anyone else ending up using them was a happy side-effect.

And yet, many people have ambitions. They will put up a website about how great their software is and how everyone should use it.

I usually put a warning that it's experimental and might not be maintained. More users, more problems.

(And yet, I'll confess to be slightly disappointed that nobody is using software that I didn't promote.)