Well, that is because there's no guaranteed success in any course of action, save for becoming change, and believing that that action alone is a small, but important, part in the network effect.
I understand HN isn't exactly the usual activist crowd, but it should be pretty easy to understand that activism is about acting against forces much larger, stronger, and better funded than you are.
Actions that bring change will be one-in-a-million, and they will always be the fruit of an individual (or a collective) that are persistent in their goals, and pursue them regardless of others joining them or not.
