But I have a hard time believing that the government and military wouldn't have been able to stop the outbreak or at the very least slowed its spread enough that it doesn't completly consume society in a matter of a week or two.
The above quote reminded me of something. Back in 2005, for my Writing Short Screenplays class, I actually written a short film script called
Handling The Dead. It involved zombies, and involved the mockumentary style back before Romero did
Diary of the Dead. But unlike the typical zombie apocalypse story, the story was about a police officer who was a part of an organized disposition unit who get called out to handle zombies. And basically, with the scenario I presented, the zombies were nothing more than pests like bugs and rats and such, while the organized disposition unit was nothing more than glorified pest control. Honestly, we've seen many versions of the world coming to an end with the zombie apocalypse, but we never see much of a story where the zombie apocalypse occurs, and it doesn't change anything in society.
Then again, with the story, I did go against a lot of typical tropes (like being bitten by a zombie turns you end to one. Basically, in the story I written, if you're bitten you don't die within time and come back. Honestly, if you die, no matter what the reason, you still come back, bitten or not), but the story was more about the cop hating his job than it being an honest "zombie story."
However, I think the reason why a majority of the stories that involve the entire world falling apart from a zombie apocalypse is because it is more interesting to see how human life changes or continues without everything we know. Basically, it's reverting the modern world back into almost into the Wild West period, where all you have is you, any allies that may be with you, your gun and your morals. If they had the government and society continue on without any real conflict due to the zombies, then it wouldn't be as interesting as the world being gone. I guess, in a way, it's the lack of "big brother" being there to help out everyone and leaving it up to the individual to make his or her own choices in surviving that is a compelling part of the zombie apocalypse scenario.