The post was intended as clarification (for those unaware) that the NBN was proposed (by the same party - Labor) well before 'clean-feed' or filtering of any form had been publicly mentioned, or suggested in Parliament.
It's debatable whether the government's original intent for the NBN was for use as a means of filtering/monitoring. I've only highlighted that any form of filtering was proposed well after the original NBN announcement (and Labor's rise to power). Not before, as suggested in your original post.
I'm not sure if you're unaware, or conveyed that message unintentionally because, at least at the beginning, it wasn't simply a case of 'hadn't worked it out.'
/* Halley */ (Halley's comment.)