I think you're really being naieve.
Every country places restrictions on who can enter it. Sometimes those governments make the conditions of entry unreasonably high... but as a country, they have a right to do it.
Australia does need immigrants, and yes, even genuine refugees count.... BUT you don't let in EVERYONE. At a point it becomes more than you can bear financially and severely affects management of the country. It's just madness to let them ALL in when there is no benefit, and actually a detriment, to doing so. To encourage that and drop your guard - stupidity. To get angry when people point that out to you - mindless.
However... If all the hundreds of asylum seekers get to live in your house until they're processed, and you have to pay to look after them when they get to Australia, I'll support that.
Already we're stressing the Australian environment with the increased population... and with more people, it will explode exponentially because people don't stop having sex and are careless with condoms in general.... and then what kind of people are breeding? Intelligent people who will contribute positively to society?... or people with zero education falling down the cracks of society?
Weigh up the odds... who is more likely to succeed?
A little cruelty now, prevents mass disruptions and potentially more violence later.
I heard two muslims (clearly refugees) argue over Iraq and Syria in the mall recently. Does Australia really need that sort of socially divisive crap happening over here? Do you want to allow it? Is that a good idea?