I don't really understand what you're trying to say, to be honest. But let me address the first point you bring up, which appears to be your main point:
Well yes, of course, most creation myths are rather vague, but in the end when you compare details, they tend not to match up to reality. I don't know of one single creation myth that is able to escape this, due to the fact that creation myths tend to make rather extraordinary claims, since they are creation myths and sort of have to deal with matters we don't fully understand yet (the creation of the universe, time-space, etc.)
Genesis for example doesn't come out any further than other creation myths in the "does it match up to reality or not?" department. It seems clear to me that it was written with symbolism in mind, rather than an exact description of how things went down.