The media does have an agenda. Their agenda is to make money. And heroes make great stories. Success is always reported. If anything it's the failures that are underreported because they are so common. Nobody would read the news if it had no surprises and reporting all the failures would fill the paper by themselves every day. As it is crime in general is grossly over reported exactly because it's actually quite rare.
All gun crime in Australia has markedly declined since gun laws were passed. Nobody thinks gun control will end gun crimes. But they do greatly reduce them because it's in even the criminals best interests to rather not use a gun.
It also reduces cop shootings because the cop knows the odds you are armed is low so he isn't so nervous.
In the UK the cops aren't even armed anymore. There is no need because the criminals aren't armed.
And what I said about Australia was that despite their strict gun laws all the farmers have legal guns. Nobody wants to disarm farmers.