DovBear had a guest post from a blogger named "Ed" dealing with age of the earth issues. In the comments for that post, a person named Yosef asked the following question...
Why does everyone get so worked up unnecessarily? There are plenty of sources that make it perfectly clear that Hashem created a mature world, just like Adam was created fully grown. We wouldn't expect the world to look literally 5,767 years old anyway. How much hevel havalim over nothing!!!
Well, to be honest, it's not the people who are willing to accept scientific evidence who are the ones getting worked up - it's those who stick to a straight Young Earth Creationist (YEC) model.
If Yosef is correct that it's all an argument over nothing at all, the following conversation would take place:
Scientist: The earth is about 4 billion years old
YEC: You're right, the world does appear that old. However, we believe that God created the world to look mature.
Scientist: But you can't prove that! It's not scientific.
YEC: You're right, it's not. But it's what we believe.
However, that's not what happens. What happens is this:
Scientist: The earth is about 4 billion years old.
YEC: No it's not. Your carbon-14 dating is all wrong, you don't have a complete fossil record, half-life decay rates could have changed, galaxies aren't receding, yadda yadda yadda...
In other words, the YEC could simply say, "yes, you're right, based on the physical evidence, it appears that the world is very old. Had we not had a tradition that God created the world 5767 years ago, we'd agree with you." But that's not what happens - instead YECs try to show the scientist that his science is wrong and that he doesn't know anything about science anyway.
It's not the scientists who are getting "all worked up" and doing all the arguing. It's the YEC who are making the most noise.