Not really, that was their point.
I'm assuming here but my guess would be, if this person IS from Lismore and WAS affected by the floods, then she would want people to understand her pain and join her movement. As such she saw the appropriate response of causing annoyance (by blocking the tunnel) to get people to understand why she was there and stop on reflect on her cause.
So she was successful, because people are speaking about it.
By no means am I saying I agree, I'd personally target politicians or relevant executives, but this is the way she saw it playing out in her mind.
And keeping cars on the road longer than they need to be, well that's not really hypocrisy. Because it's the long term goal they're aiming at, i.e. moving off fossil fuels, hence a prolonged few hours of emissions isn't going t make much of a difference