Your post is contradictory in a myriad of ways.
Your post presumes there is ample competition. Why not, therefore, allow existing competitors to make the decision for themselves about how much capacity to fly into Australia? Unless there is evidence of anti-competitive conduct (eg capacity dumping), let the suppliers decide how to fly to this country just as you are free to decide which carrier you fly.
Qatar are already allow to fly into this country. So it's human rights record is irrelevant. If it were relevant, it would have already been banned. And if we start banning airlines from countries with human rights records that we do not like, where do we stop? The US ran Guantanamo for years. Are they gone? Singapore is a semi-authoritarian regime. Is it gone? Emirates, Etihad. Also gone? Sri Lanka is descending into authoritarianism. India has a horrific human rights record. China, Indonesia, ... That's one way to guarantee there will be no airlines flying into Australia and we are locked inside our country.
How about you decide where you spend your travel dollars and you let everyone else decide where to spend their travel dollars?