Yes it does deserve a response, I'll try one.
"For example: if my nieces and nephews don't need to live in Sydney, can they move to and raise their families in Coonabarabran without 'missing out' on jobs or having a 'second class life'. If so it creates less pressure for housing in Sydney and a more vibrant and diverse Australia."
OK let's look at this. If the NBN extends to all of the country then your nieces and nephews can move to the country and they will, while at home, be able to pretend they are in a city. They will be technically able (I say this because content providers may not support a level playing field) to access the same shows and entertainment options. Jobs are a different matter. There will always be classes of jobs that will not be available unless you can be physically present. There will also always be employers who expect a physical presence. The NBN will not change this. If you are fortunate enough to secure employment that allows you to work remotely then here's where the NBN becomes an enabler.
Medical. Despite all the rhetoric, you won't find specialist treatment online anytime soon. It'll take a generation at least. Maybe your grand-nieces and nephews would see the benefit. Until then, find a good local doctor and make sure you're not too far from a hospital.
Final comment. If you want a vibrant and diverse Australia then you should be moving to the cities. Small towns and regional centers breed cultural conformity not diversity. History shows us that cultural progress happens when you get large numbers of people together, not when you move them apart. Now you may be thinking that the 'togetherness' can happen online and that's a plus for an NBN. It doesn't work like that. People being exposed to different modes of thinking (whether they want to or not) is what drives culture. Online, people tend to gravitate towards sites and people who think the same as they do.