Sure - and as a matter of fact, this is largely the angle I approach religion from these days - i.e. that we collected a series of parables, rules, and traditions that, when combined, lead to a "good life" (or, more cynically, provide competitive advantages to societies who adopt them in a sort of "memetic natural selection" paradigm).
But when I look at the mythology of Christianity, especially the parts of it that are mainstream and not parts of mystical or esoteric traditions, I don't find it to be a compelling enough story to base my life around (or at least, not enough to go and declare my faith in it every Sunday).
The central "myth" of Christianity is that humans are born into a state of sin and cannot reach salvation (Heaven, eternal life, or maybe more "mystically" a state of oneness with the Divine). And the myth goes on to state that God essentially allowed/caused humans to sacrifice his son to Him so that this original sin could be washed away and allow humans to be "saved."
It seems to me that this has very little explanatory power for the sorts of existential questions like "why are we here," "why are we conscious," "why is there so damn much other stuff in the universe".
As a story, there's a lot of appeal to me. Jesus as a role model, as an example of how we ought to try to be, has some good features (some bad ones too, but that's OK with me since I'm not taking the story as the literal word of God). I just don't know how people go from "this story has some nice features worth meditating on in a secular way" to "this story explains why things are the way they are and what we're supposed to do about it."
This is one of the things I find more appealing about Judaism, because there appears (to an outsider) to be much more of a tradition of grappling with faith, of trying to unpack the meaning of the "words of God" and relate them to the human condition. I'm sure there's some of that in Christian traditions too, but it was never a mainstream feature of the Catholicism that I grew up with.
