But at what point does Genesis go from an allegory, to literal? Can't have it both ways. Can't believe in evolution and then also believe that the Adam and Eve story is a literal representation of the origin of mankind. To do so means that you have to toss out evolution, and to not do so, means that you believe it's literal, and therefore can lead to the original sin part of the story, as well.
I don't disagree, but this isn't my problem to solve. All I know is what the Catholic Church says on the subject. They don't believe that the parents of humanity were a guy named "Adam" and a woman named "Eve" who lived in a literal garden, but they do hold as a point of doctrine that whatever humanity is descended from, there is a clear division between "true humans" and all other humanoids, and that all of the "true humans" who have ever lived are all descended from an original lone pair of "true humans".
I believe that Genesis is a story relating to morality, and sort of a parable as to how human beings struggle with their own morality, and what God may expect of us.
And I'm not going to say that your interpretation is wrong; I'm just saying that it isn't the Catholic Church's official interpretation. They teach that certain aspects of the story are literally true. The Catholic position on this is laid out in the Papal encyclical
Humani Generis - I gave a quote and a link earlier.
Is the Catholic position less intellectually honest than a purely literal interpretation? I dunno. I'm more concerned with what their position is than what it ought to be.