A Question for Mr. Darwin

A big event in our lives right now is that we are going to be grandparents in January! Elisa and Chris are expecting. The due date is January 22, and we are planning to go to San Diego for that joyful event, Lord willing, of course. This is our first grandbaby and we are super excited about it. We don't know yet if it is a him or her, but we do know that this little one, the size of a plum, already had a unique set of fingerprints. In fact, this little baby has had his or her unique fingerprints for a couple of weeks already, as they appear at Week 13, and tomorrow starts Week 15 for Elisa.

I need you to explain this to me, Mr. Darwin. What is the
evolutionary purpose of unique fingerprints? Maybe millions of years
ago, those human-like creatures who all had fingerprints the same got
confused going through the bio-metric readers to get into their
skyscrapers, so people with unique fingerprints had a better chance
of keeping their jobs, and so continuing to pass on their genes? And
what gene is it that spins out a new set of fingerprints for each of
the (what is it now?) 6 billion or is it 8 billion people on the
planet? Or maybe it was that our human-like ancestors that got booked
for their crimes and fingerprinted, and didn't have unique
fingerprints all got mixed up with each other, so languished in their
jail cells, while those with unique fingerprints were able to be
properly identified and catalogued and so could properly serve out
their sentences or be released on time? I need some help here. I'm
just not getting how unique fingerprints contribute to the
propagation of the species through natural selection.

And as long as we are talking about unique, what about each snowflake
being unique? What is the purpose of that?

I propose that those unique fingerprints are the signature of God. In
my humble opinion God goes out of His way to extravagantly proclaim
His glory through Creation. As Bill says, "I personally go with the
Fearfully and Wonderfully Made explanation." That I can understand.