sigh... seriously?
Look, for one thing, saying "zomg, how can you not think that you were created" is quite a few big leaps and bounds away from "...and the creator is clearly Yahweh of the Bible, who sent his son to earth as a blood sacrifice for our sins that were set in place when our ancestors Adam and Eve ate a fruit that they were told not to eat and if people don't acknowledge or accept that blood sacrifice, they go to a place of eternal torment." etc. So you can disbelieve that anyone could not see there is a Creator, but you're also going to be incredulous or at least just as pitying of poor non-believers who believe in other different Creators. It's just not as simple as believing you have a Creator, any Creator.
For another, when I walk outside, I look around and think "Yeah... I can see how people thought the earth was flat. It does look that way. I guess a bit of inspection reveals that wrong, but intuitively it seems like common sense". Now, I'm not saying Christians or theists haven't inspected things enough to see there isn't a Creator - obviously they have - but it doesn't necessarily follow that intuition will be correct and that some people, upon inspection, will decide a creator is not necessary for their existence. The Appeal to Incredulity doesn't really cut it.
Maybe there is a creator. Maybe it's a deist god. I'm pretty sure it's not biblegod, or korangod or even Vishnu. I count deists as atheists, because theirs is not a theistic god, therefore they are without-theism - a-theist. So I'm not an atheist because I think I know there is absolutely no god nor creator. I'm an atheist because I have seen no evidence to make the truth claim that there is a god and to define that god in a theistic fashion.