There is always something to do for any skill level and any combination of skills. My claim that we are all responsible comes out of my deep belief that we all have something to give - even a newbie.
Coding isn't the only skill this site needs to run smoothly. Editing, writing, interpersonal skills, project management and volunteer coordination skills all could be put to good use. I think if you reread my post you will see that I made a point of listing many things that people could do without needing to be part of pmdev. And the list is by no means exhaustive.
If you aren't sure where you fit in, you can always ask in the chatterbox, or if you are feeling particularly bold, in a PM discussion node. If you time it right there will almost certainly be someone willing to brainstorm with you.