It is correct. Just because your livelihood might hinge on a specific project doesn't mean that its developers have any obligation to accept your patches. It means you have to be very careful in choosing which project you hitch your wagon. Obligations are created, in order, through law, contracts or personal relationships. If you have neither, you have nothing.

Why is this down-voted? Everything we do in this industry rests upon somebody else's gift of free/open software, that is the reality of it. I do feel an inclination to contribute back however I can, even if it's just documentation, or submitting a (properly detailed) bug report, for precisely the reason described here.