Throw the baby out with the bath water, apparently. But imagine the effort and time it would take to get rid of each zombie by hunting them down one by one.
well if the majority of this went on while they were away camping, there are very few humans left in Brisbane and thousands of zombies with little to hunt. By now they're starting to pour out and something needs to be done. It looks like t/hey might be at least aiming for groups of zombies and trying to avoid people.
The burning city looks cool.