The parents don't get a free pass.
It possible there are smaller children in the family that cannot make the trip.
There are an abundance of various factors that your thinking cannot account for.
No, they don't get a free pass.
Don't get me wrong, I feel for the situation they're in.
But if you want a so-called "better life" for your children, you take up the yoke and get them out of the country yourself.
And if you have a small child? Take them with you. Be their arms and legs, their protector. There is no excuse for you to send 5-8-year-old kids alone while you huddle in the danger with a baby or a toddler.