Job1207, whatever rockets are eventually used to go back to the moon will be used a whole lot more times per year than just those going to the ISS. You can indeed argue whether or not this should be the Ares I and V designs or not, and I would be perfectly happy to see something else myself.
But going back to the moon this time can NOT be just a flags and footsteps affair, if we go back this time we will need at least one permanent base, and possibly even more. In fact, a real exploration of the moon would require at least 100 people or even more over more than a decade. The land area of the moon is more than the land area of Africa + the land area of Australia combined, so absolutely NOT, we have NOT "been there and done that" at all! And the original moon walking astronauts have been saying that for many years now.
Even more importantly, if we are really going to go further out into the solar system we are going to have to learn to mine the moon's many resources to keep the eventual costs of going further out to even a reasonable amount. We can not continue to expand and still bring the materials needed up though the Earth's immense gravity well and atmospheres. It just can not happen.
Heck, just being able to use the moon's resources is going to require that we reduce the Earth to LEO costs by a large fraction. It IS indeed sort of a "Catch 22" type of situation, as we need lower costs, and one of the the best ways to obtain those lower costs is to have many flights, and in order to have many flights we need lower costs!
And I am NOT saying that Ares I and V are the ways to do this, and they are certainly not the only ways. But if Congress wants to insist that it is better to have at least one way to go further out than LEO, then neither am I against their doing so even with a design that I personally do not like so much.
NASA and the Human Space Programs are NOT an EXPENSE of the Federal Budget, they are its greatest single INVESTMENT in the future, and eventually both those countries and companies that are willing to see that and act on it are going to be far wealthier than even the oil rich Arabian countries are now!!
So, while it IS useful to shoot for lower costs for such programs, in the long run it will make no difference whatever if we do so or not! Especially as NASA is already such a tiny part of federal funding anyway!
And this can still be done while fully funding such as spacex for going to and from the ISS!