Whi isn't natural selection, genetic drift, mutation, and gene flow part of creationism?

Creationism is about those first six days, and usually includes the flood theory because the earth has obviously changed since then. The natural selection, genetic drift, mutation and gene flow we see today are understood to have been taking place for at least the few thousand years that the rate of our shrinking sun allows as reasonable, but that and the expanding orbit of the moon (reducing the tides), extrapolated backwards, simply does not allow enough time on a habitable earth for the introduction of new species.