I don’t believe I have ever heard the idea that creationism denies micro-evolution. The issue is macro-evolution, by which I mean the change of one form of life into another, including the leap from one phylum to another.
Selecting the survival of arganisms by the introduction of stimuli hasn’t been disputed for some time, to my knowledge. Heck, even Pavlov proved the adaptability of living beings (although not on a genetic level).
So what is going to stop adaptive “micro” changes within a population such that two separate branches will accumulate a 2% genetic difference, as is the amount of difference between humans and chimpanzees?