And I assume you would then also understand if people had better things to do than be shat on by that community (in the case of #2). #1 is simply false; when there is little context for how to contribute it is completely understandable that someone may be paralyzed by indecision. It has nothing to do with laziness.
Contributing to open-source projects is, in my experience, often more trouble than it's worth--precisely because all too often the people already involved have forgotten (or never had the social capability to know and understand) that #1 is a falsehood and #2 is an eminently reasonable reaction for any remotely normal human being. I still contribute to some projects, but only projects that I or close personal friends maintain. It allows me to tell them to unscrew their heads when they act like the grandparent poster.