Isn’t mutation almost always a bad thing? Nevertheless, some people will no doubt say fruit flies prove nothing. As a layman, I don’t know enough about genetics, DNA, mutation, etc., to prove or disprove them. I think the vast majority are in the same boat. We only know what the experts in a particular field tell us. I’d rather not fight over things I cannot prove one way or the other. I’m even that way about Christianity. I try to understand the Word and live my life according to it, but when it comes to others believing (or not believing) the same things, I present my point of view. If they are not receptive, I’m not going to browbeat them over it.
Evolosers love to talk about "beneficial mutations" but the examples they provide always involve claims that something like sickle cell anemia is a "beneficial mutation" because it reduces the lucky victim's susceptibility to malaria. All such supposed beneficial mutations involve loss of genetic information and not gain and all of the known mutations amongst humans have names, like Down syndrome, cri-du-chat syndrome, cystic fibrosis etc. etc.
In real life I could just as easily save somebody from malaria by shooting them through the head with a 44, which would be a bit quicker than sickle cell and in fact if you think about it, you've probably never seen any sort of a movie where some beautiful African girl runs up to Tarzan or George of the Jungle screaming "Bwana, SAVE ME!! them ole malaria germs are AFTER me and I need you to shoot me through the head with that 375 H&H you're carryin so they don't get me!!!"
Blond hair and blue eyes are a mutation.
I’m ok with that.
When expressed, yes.
While a lot of mutations aren't ever expressed, that is because DNA and the triplet-codon amino acid coding-system are fault tolerant. Then, the diploid/polyploid chromosome structure comes in over that and is also fault tolerant. Then, the sexual reproductive system comes over both of those and is fault tolerant as well.
As you can see, the entire structure of vast numbers of organisms has several fault tolerant systems in place. This points toward a created biology that was created at a high level of complexity that is designed to resist decline and decay.
It does not point toward a biology that evolved out of 'whatever' for no reason whatsoever.