I'm always disappointed when conversations here are full of "why don't you just contribute to <other project> instead?" Have you never simply desired to do something yourself?
Right? I don't think HN needs more obligatory "this is a big undertaking and likely to fail" comments. We can take those as implied. We should 1) engage more meaningfully with the project and 2) keep in mind that negativity hurts a lot more than positivity helps. If you're not up to the task, fine, and maybe they aren't either, but don't drag them down before they've tried.