I did, you just didnt like the answer.
OP's Point.
"So, creationists, HOW did today's diversity arise from a pair or a few pairs since the Flood (which, for YECs, means that all of this diversity has to be explained as having occurred in only a few thousand years with nobody noticing)?"
Answer. Again:
"Hybridization increased additive genetic and environmental variances, increased heritabilities to a moderate extent, and generally strengthened phenotypic and genetic correlations. New additive genetic variance introduced by hybridization is estimated to be two to three orders of magnitude greater than that introduced by mutation."
So new additive genetic variance is two to three times greater than that introduced by mutations from mating. This is because recombining genomes at inception affects several loci at once, while your mutation affects one single loci. If it doesn't happen to be neutral, and if it doesn't happen to be harmful.
So the simple breeding of those pairs increases new additive genetic variance two to three times more than mutation.
Quit ignoring the answer because you don't like to hear the reality that mutation just isn't that important in producing variation....