When you make a huge investment, it's hard to walk away from it without a return that justifies the effort. It's known as 'the sunk cost fallacy'. It holds that further investments or commitments are justified because the resources already invested will be lost otherwise.
It is almost always wrong (hence, the 'fallacy' bit).
But it's the reason the Australian Government (and the US Government) has banned travel from India. After so much pain to make Australia COVID-free, the only way COVID will enter the community, as we have seen, is through the so-called quarantine system, which continues to fail. Again. And again.
So why risk bringing 9000 people into Australia from a country being overrun by COVID, and whose health system will, almost certainly, be unable to test potential repatriants in the time required to bring them to Australia with a degree of safety?
And when they ask, 'what is the value of an Australian passport if it no longer brings certain rights?', that's a good question. But as we have all lost considerable rights in the past year, perhaps now is not the right time to start making questions like that. When freedom of speech, movement and association return, then you can ask.