We could try to get our act together as a movement and follow their example, organizing and pressing ahead with some kind of plan
what example is that?
Exactly what you quoted: organizing and pressing ahead with some kind of plan.
This has nothing to do with SSM, by the way; don't be distracted by that. Substitute the struggle to decriminalize interracial marriage if that makes it more palatable for you. Or the civil rights struggles; Rosa Parks' lawsuit was planned, it didn't just happen.
I know many people are doing what they can, making sure pro-PM is represented in comments sections, or writing responses to anti-PM websites. And this very forum represents a big step toward organizing.
But it feels like the time is right to be moving forward, and I find that frustrating.